Properties

Reboot on BIOS Settings Change

When the server is rebooted after you change one or more BIOS settings.

If you enable this setting, the server is rebooted according to the maintenance policy in the server's service profile. For example, if the maintenance policy requires user acknowledgment, the server is not rebooted and the BIOS changes are not applied until a user acknowledges the pending activity.

If you do not enable this setting, the BIOS changes are not applied until the next time the server is rebooted, whether as a result of another server configuration change or a manual reboot.

BIOS Setting

Quiet Boot

What the BIOS displays during Power On Self-Test (POST). This can be one of the following:

• Disabled—The BIOS displays all messages and Option ROM information during boot.

• Enabled—The BIOS displays the logo screen, but does not display any messages or Option ROM information during boot.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

POST error pause

What happens when the server encounters a critical error during POST. This can be one of the following:

• Disabled—The BIOS continues to attempt to boot the server.

• Enabled—The BIOS pauses the attempt to boot the server and opens the Error Manager when a critical error occurs during POST.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Resume on AC power loss

How the server behaves when power is restored after an unexpected power loss. This can be one of the following:

• Stay Off—The server remains off until manually powered on.

• Last State—The server is powered on and the system attempts to restore its last state.

• Reset—The server is powered on and automatically reset.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Front panel lockout

Whether the power and reset buttons on the front panel are ignored by the server. This can be one of the following:

• Disabled—The power and reset buttons on the front panel are active and can be used to affect the server.

• Enabled—The power and reset buttons are locked out. The server can only be reset or powered on or off from the CIMC GUI.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

CDN Control

Consistent Device Naming allows Ethernet interfaces to be named in a consistent manner. This makes Ethernet interface names more uniform, easy to identify, and persistent when adapter or other configuration changes are made.

Whether consistent device naming is enabled or not. This can be one of the following:

• Disabled—Consistent device naming is disabled for the BIOS policy.

• Enabled—Consistent device naming is enabled for the BIOS policy. This enables Ethernet interfaces to be named consistently.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Intel Turbo Boost Tech

Whether the processor uses Intel Turbo Boost Technology, which allows the processor to automatically increase its frequency if it is running below power, temperature, or voltage specifications. This can be one of the following:

• Disabled—The processor does not increase its frequency automatically.

• Enabled—The processor uses Turbo Boost Technology if required.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Enhanced Intel SpeedStep Tech

Whether the processor uses Enhanced Intel SpeedStep Technology, which allows the system to dynamically adjust processor voltage and core frequency. This technology can result in decreased average power consumption and decreased average heat production. This can be one of the following:

• Disabled—The processor never dynamically adjusts its voltage or frequency.

• Enabled—The processor utilizes Enhanced Intel SpeedStep Technology and enables all supported processor sleep states to further conserve power.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

We recommend that you contact your operating system vendor to make sure your operating system supports this feature.

Intel HyperThreading Tech

Whether the processor uses Intel Hyper-Threading Technology, which allows multithreaded software applications to execute threads in parallel within each processor. This can be one of the following:

• Disabled—The processor does not permit hyperthreading.

• Enabled—The processor allows for the parallel execution of multiple threads.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

We recommend that you contact your operating system vendor to make sure the operating system supports this feature.

Intel Speed Select

Allows improved CPU performance by using Intel Speed Select technology to tune the CPU to run at one of three operating profiles, based on number of logical processor cores, frequency, and TDP thread setting, to improve performance over the basic Platform Default setting. These profiles correspond to High, Medium, and Low Core settings and can be one of the following:

• Base—The processor uses Base.

• Config 1—The processor uses Config 1.

• Config 2—The processor uses Config 2.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Low core profiles enable the CPU to run at maximum frequency. Refer to Intel Speed Select sample settings.

Core Multi Processing

Sets the state of logical processor cores per CPU in a package. If you disable this setting, Intel Hyper Threading technology is also disabled. This can be one of the following:

• All—Enables multiprocessing on all logical processor cores.

• 1 through n—Specifies the number of logical processor cores per CPU that can run on the server. To disable multiprocessing and have only one logical processor core per CPU running on the server, choose 1.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

We recommend that you contact your operating system vendor to make sure your operating system supports this feature.

Execute Disable Bit

Classifies memory areas on the server to specify where the application code can execute. As a result of this classification, the processor disables code execution if a malicious worm attempts to insert code in the buffer. This setting helps to prevent damage, worm propagation, and certain classes of malicious buffer overflow attacks. This can be one of the following:

• Disabled—The processor does not classify memory areas.

• Enabled—The processor classifies memory areas.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

We recommend that you contact your operating system vendor to make sure your operating system supports this feature.

Intel Virtualization Technology

Whether the processor uses Intel Virtualization Technology, which allows a platform to run multiple operating systems and applications in independent partitions. This can be one of the following:

• Disabled—The processor does not permit virtualization.

• Enabled—The processor allows multiple operating systems in independent partitions.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Hardware Prefetcher

Whether the processor allows the Intel hardware prefetcher to fetch streams of data and instruction from memory into the unified second-level cache when necessary. This can be one of the following:

• Disabled—The hardware prefetcher is not used.

• Enabled—The processor uses the hardware prefetcher when cache issues are detected.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Adjacent Cache Line Prefetcher

Whether the processor fetches cache lines in even/odd pairs instead of fetching just the required line. This can be one of the following:

• Disabled—The processor only fetches the required line.

• Enabled—The processor fetches both the required line and its paired line.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

DCU Streamer Prefetch

Whether the processor uses the DCU IP Prefetch mechanism to analyze historical cache access patterns and preload the most relevant lines in the L1 cache. This can be one of the following:

• Disabled—The processor does not try to anticipate cache read requirements and only fetches explicitly requested lines.

• Enabled—The DCU prefetcher analyzes the cache read pattern and prefetches the next line in the cache if it determines that it may be needed.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

DCU IP Prefetcher

Whether the processor uses the DCU IP Prefetch mechanism to analyze historical cache access patterns and preload the most relevant lines in the L1 cache. This can be one of the following:

• Disabled—The processor does not preload any cache data.

• Enabled—The DCU IP prefetcher preloads the L1 cache with the data it determines to be the most relevant.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

KTI Prefetch

KTI prefetch is a mechanism to get the memory read started early on a DDR bus. This can be one of the following:

• Disabled—The processor does not preload any cache data.

• Enabled—The KTI prefetcher preloads the L1 cache with the data it determines to be the most relevant.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

LLC Prefetch

Whether the processor uses the LLC Prefetch mechanism to fetch the date into the LLC. This can be one of the following:

• Disabled—The processor does not preload any cache data.

• Enabled—The LLC prefetcher preloads the L1 cache with the data it determines to be the most relevant.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

XPT Prefetch

Whether XPT prefetch is used to enable a read request sent to the last level cache to issue a copy of that request to the memory controller prefetcher. This can be one of the following:

• Disabled—The CPU does not use the XPT Prefetch option.

• Enabled—The CPU enanbles the XPT prefetcher option.

• Auto—The CPU auto enables the XPT prefetcher option.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Direct Cache Access

Allows processors to increase I/O performance by placing data from I/O devices directly into the processor cache. This setting helps to reduce cache misses. This can be one of the following:

• Auto—The CPU determines how to place data from I/O devices into the processor cache.

• Disabled—Data from I/O devices is not placed directly into the processor cache.

• Enabled—Data from I/O devices is placed directly into the processor cache.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Processor C State

Whether the system can enter a power savings mode during idle periods. This can be one of the following:

• Disabled—The system remains in a high-performance state even when idle.

• Enabled—The system can reduce power to system components such as the DIMMs and CPUs.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

We recommend that you contact your operating system vendor to make sure your operating system supports this feature.

Processor C1E

Allows the processor to transition to its minimum frequency upon entering C1. This setting does not take effect until after you have rebooted the server. This can be one of the following:

• Disabled—The CPU continues to run at its maximum frequency in the C1 state.

• Enabled—The CPU transitions to its minimum frequency. This option saves the maximum amount of power in the C1 state.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Processor C3 Report

Whether the processor sends the C3 report to the operating system. This can be one of the following:

• Enabled—The processor sends the C3 report to the OS.

• Disabled—The processor does not send the C3 report.

• ACPI C2—The processor sends the C3 report using the advanced configuration and power interface (ACPI) C2 format.

• ACPI C3—The processor sends the C3 report using the ACPI C3 format.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

On the Cisco UCS B440 Server, the BIOS Setup menu uses enabled and disabled for these options. If you specify acpi-c2 or acpi-c2, the server sets the BIOS value for that option to enabled.

Processor C6 Report

Whether the processor sends the C6 report to the operating system. This can be one of the following:

• Disabled—The processor does not send the C6 report.

• Enabled—The processor sends the C6 report.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Processor C7 Report drop-down list

Whether the processor sends the C7 report to the operating system. This can be one of the following:

• C7—The processor sends the report using the C7 format.

• C7s—The processor sends the report using the C7s format.

• Disabled—The processor does not send the C7 report.

• Enabled—The processor sends the C7 report.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Processor CMCI

Enables CMCI generation. This can be one of the following:

• Disabled—The processor disables CMCI.

• Enabled—The processor enables CMCI.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

CPU Performance

Sets the CPU performance profile for the server. This can be one of the following:

• Custom —

• Enterprise—For M3 and higher servers, all prefetchers and data reuse are enabled.

• High Throughput—Data reuse and the DCU IP prefetcher are enabled, and all other prefetchers are disabled.

• HPC—All prefetchers are enabled and data reuse is disabled. This setting is also known as high-performance computing.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Max Variable MTRR Setting

Allows you to select the number of mean time to repair (MTRR) variables. This can be one of the following:

• Auto Max—BIOS uses the default value for the processor.

• 8—BIOS uses the number specified for the variable MTRR.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Local X2 APIC

Allows you to set the type of Application Policy Infrastructure Controller (APIC) architecture. This can be one of the following:

• Disabled—Processor disables Local X2 APIC.

• Enabled—Processor enables Local X2 APIC.

• XAPIC—Uses the standard xAPIC architecture.

• X2APIC—Uses the enhanced x2APIC architecture to support 32 bit addressability of processors.

• AUTO—Automatically uses the xAPIC architecture that is detected.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Power Technology

Enables you to configure the CPU power management settings for the following options:

• Enhanced Intel Speedstep Technology

• Intel Turbo Boost Technology

• Processor Power State C6

Power Technology can be one of the following:

• Disabled—The server does not perform any CPU power management and any settings for the BIOS parameters mentioned above are ignored.

• Energy Efficient—The server determines the best settings for the BIOS parameters mentioned above and ignores the individual settings for these parameters.

• Performance—The server automatically optimizes the performance for the BIOS parameters mentioned above.

• Custom—The server uses the individual settings for the BIOS parameters mentioned above. You must select this option if you want to change any of these BIOS parameters.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Energy Performance

Allows you to determine whether system performance or energy efficiency is more important on this server. This can be one of the following:

• Performance — The server provides all server components with full power at all times. This option maintains the highest level of performance and requires the greatest amount of power.

• Balanced Performance — The server provides all server components with enough power to keep a balance between performance and power.

• Balanced Energy — The server provides all server components with enough power to keep a balance between performance and power.

• Energy Efficient — The server provides all server components with less power to keep reduce power consumption.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Frequency Floor Override

Whether the CPU is allowed to drop below the maximum non-turbo frequency when idle. This can be one of the following:

• Disabled— The CPU can drop below the maximum non-turbo frequency when idle. This option decreases power consumption but may reduce system performance.

• Enabled— The CPU cannot drop below the maximum non-turbo frequency when idle. This option improves system performance but may increase power consumption.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

P STATE Coordination

Allows you to define how BIOS communicates the P-state support model to the operating system. There are 3 models as defined by the Advanced Configuration and Power Interface (ACPI) specification.

• HW ALL—The processor hardware is responsible for coordinating the P-state among logical processors with dependencies (all logical processors in a package).

• SW ALL—The OS Power Manager (OSPM) is responsible for coordinating the P-state among logical processors with dependencies (all logical processors in a physical package), and must initiate the transition on all of the logical processors.

• SW ANY—The OS Power Manager (OSPM) is responsible for coordinating the P-state among logical processors with dependencies (all logical processors in a package), and may initiate the transition on any of the logical processors in the domain.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

DRAM Clock Throttling

Allows you to tune the system settings between the memory bandwidth and power consumption. This can be one of the following:

• Auto — CPU determines the DRAM Clock Throttling settings.

• Balanced— DRAM clock throttling is reduced, providing a balance between performance and power.

• Performance—DRAM clock throttling is disabled, providing increased memory bandwidth at the cost of additional power.

• Energy Efficient—DRAM clock throttling is increased to improve energy efficiency.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

External SSC enable

This option allows you to Enable/Disable the Clock Spread Spectrum of the external clock generators.

• Disabled— Clock Spread Spectrum support is not available.

• Enabled— Clock Spread Spectrum support is always available.

• Platform Default — The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Channel Interleaving

Whether the CPU divides memory blocks and spreads contiguous portions of data across interleaved channels to enable simultaneous read operations. This can be one of the following:

• Auto—The CPU determines what interleaving is done.

• 1 Way—

• 2 Way

• 3 Way

• 4-way—The maximum amount of channel interleaving is used.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Rank Interleaving

Whether the CPU interleaves physical ranks of memory so that one rank can be accessed while another is being refreshed. This can be one of the following:

• Auto—The CPU determines what interleaving is done.

• 1 Way—

• 2 Way

• 4-way

• 8 Way—The maximum amount of rank interleaving is used.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Sub NUMA Clustering

Whether the CPU supports sub NUMA clustering, in which the tag directory and the memory channel are always in the same region. This can be one of the following:

• Disabled— Sub NUMA clustering does not occur.

• Enabled— Sub NUMA clustering occurs.

• Platform Default — The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IMC Interleave

This BIOS option controls the interleaving between the Integrated Memory Controllers (IMCs).

• 1-way Interleave—There is no interleaving.

• 2-way Interleave—Addresses are interleaved between the two IMCs.

• Auto —CPU determines the IMC Interleaving mode.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Memory Interleaving

Whether the CPU interleaves the physical memory so that the memory can be accessed while another is being refreshed. This can be one of the following:

• 2 Way Node Interleave —

• 4 Way Node Interleave

• Numa - 1 Way Node Interleave

• 8 Way interleaving Inter Socket

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Demand Scrub

Whether the system corrects single bit memory errors encountered when the CPU or I/O makes a demand read. This can be one of the following:

• Disabled— Single bit memory errors are not corrected.

• Enabled— Single bit memory errors are corrected in memory and the corrected data is set in response to the demand read.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Patrol Scrub

Whether the system actively searches for, and corrects, single bit memory errors even in unused portions of the memory on the server. This can be one of the following:

• Disabled—The system checks for memory ECC errors only when the CPU reads or writes a memory address.

• Enabled—The system periodically reads and writes memory searching for ECC errors. If any errors are found, the system attempts to fix them. This option may correct single bit errors before they become multi-bit errors, but it may adversely affect performance when the patrol scrub is running.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

DCPMM Firmware Downgrade

This can be one of the following:

• Disabled—

• Enabled—

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Configurable TDP Control

Allows you to set customized value for Thermal Design Power (TDP). This can be one of the following:

• Auto— Uses the rated TDP value of the processor.

• Manual—Allows you to customize the TDP value.

Altitude

The approximate number of meters above sea level at which the physical server is installed. This can be one of the following:

• Auto—The CPU determines the physical elevation.

• 300 M—The server is approximately 300 meters above sea level.

• 900 M—The server is approximately 900 meters above sea level.

• 1500 M—The server is approximately 1500 meters above sea level.

• 3000 M—The server is approximately 3000 meters above sea level.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Package C State Limit

The amount of power available to the server components when they are idle. This can be one of the following:

• Auto —The CPU determines the physical elevation.

• No Limit—The server may enter any available C state.

• C0—The server provides all server components with full power at all times. This option maintains the highest level of performance and requires the greatest amount of power.

• C1—When the CPU is idle, the system slightly reduces the power consumption. This option requires less power than C0 and allows the server to return quickly to high performance mode.

• C3—When the CPU is idle, the system reduces the power consumption further than with the C1 option. This requires less power than C1 or C0, but it takes the server slightly longer to return to high performance mode.

• C6—When the CPU is idle, the system reduces the power consumption further than with the C3 option. This option saves more power than C0, C1, or C3, but there may be performance issues until the server returns to full power.

• C2—When the CPU is idle, the system reduces the power consumption further than with the C1 option. This requires less power than C1 or C0, but it takes the server slightly longer to return to high performance mode.

• C7—When the CPU is idle, the server makes a minimal amount of power available to the components. This option saves the maximum amount of power but it also requires the longest time for the server to return to high performance mode.

• C7s—When the CPU is idle, the server makes a minimal amount of power available to the components. This option saves more power than C7, but it also requires the longest time for the server to return to high performance mode.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

CPU Hardware Power Management drop-down list

Enables processor Hardware Power Management (HWPM). This can be one of the following:

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

• Disabled—HWPM is disabled.

• HWPM Native Mode—HWPM native mode is enabled.

• HWPM OOB Mode—HWPM Out-Of-Box mode is enabled.

• Native Mode with no Legacy (only GUI)

Energy Performance Tuning drop-down list

Determines if the BIOS or Operating System can turn on the energy performance bias tuning. The options are BIOS and OS.

• BIOS—

• OS—

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Workload Configuration

This feature allows for workload optimization. The options are Balanced and I/O Sensitive:

• Balanced—

• IO Sensitive—

• NUMA — (Only GUI)

• UMA — (Only GUI)

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Core Performance Boost

Whether the AMD processor increases its frequency on some cores when it is idle or not being used much. This can be one of the following:

• Auto—The CPU automatically determines how to boost performance.

• Disabled—Core performance boost is disabled.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Uncore Frequency Scaling

Allows you configure the scaling of the uncore frequency of the processor. This can be one of the following:

• Enabled—Uncore frequency of the processor scales up or down based on the load. (Default.)

• Disabled—Uncore frequency of the processor remains fixed.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Refer to the Intel Dear Customer Letter (DCL) to know the fixed higher and lower values for Uncore Frequency Scaling.

Configurable TDP Level

Allows adjustments in processor thermal design power (TDP) values. By modifying the processor behavior and the performance levels, power consumption of a processor can be configured and TDP can be adjusted at the same time. Hence, a processor operates at higher or lower performance levels, depending on the available cooling capacities and desired power consumption.

This can be one of the following:

• Normal—The CPU operates at its normal performance level. (Default.)

• Level 1

• Level 2

UPI Link Speed

Allows you to configure the Intel Ultra Path Interconnect (UPI) link speed between multiple sockets. This can be one of the following:

• Auto—Automatically configures the optimal link speed. (Default)

• 9.6GT/s (gigatransfers per second)—Configures the optimal link speed at 9.6GT/s

• 10.4GT/s—Configures the optimal link speed at 10.4GT/s

• 11.2GT/s—Configures the optimal link speed at 11.2GT/s

Global C-state Control

Whether the AMD processors control IO-based C-state generation and DF C-states. This can be one of the following:

• Auto—The CPU automatically determines how to control IO-based C-state generation.

• Disabled—Global C-state control is disabled.

• Enabled—Global C-state control is enabled.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

L1 Stream HW Prefetcher

Whether the processor allows the AMD hardware prefetcher to speculatively fetch streams of data and instruction from memory into the L1 cache when necessary. This can be one of the following:

• Auto—The CPU determines how to place data from I/O devices into the processor cache.

• Disabled—The hardware prefetcher is not used.

• Enabled—The processor uses the hardware prefetcher when cache issues are detected.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

L2 Stream HW Prefetcher

Whether the processor allows the AMD hardware prefetcher to speculatively fetch streams of data and instruction from memory into the L2 cache when necessary. This can be one of the following:

• Auto—The CPU determines how to place data from I/O devices into the processor cache.

• Disabled—The hardware prefetcher is not used.

• Enabled—The processor uses the hardware prefetcher when cache issues are detected.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

AMD Memory Interleaving

Whether the AMD CPU interleaves the physical memory so that the memory can be accessed while another is being refreshed. This controls fabric level memory interleaving. Channel, die and socket have requirements based on memory populations and will be ignored if the memory does not support the selected option.This can be one of the following:

• Auto—The CPU determines how to interleave memory.

• Channel—Interleaves the physical address space over multiple channels, as opposed to each channel owning single consecutive address spaces.

• Die—Interleaves the physical address space over multiple dies, as opposed to each die owning single consecutive address spaces.

• None—Consecutive memory blocks are accessed from the same physical memory.

• Socket—Interleaves the physical address space over multiple sockets, as opposed to each socket owning single consecutive address spaces.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

AMD Memory Interleaving Size

Determines the size of the memory blocks to be interleaved. It also determines the starting address of the interleave (bit 8,9,10 or 11). This can be one of the following:

• 1 KB

• 2 KB

• 256 Bytes

• 512 Bytes

• Auto—The CPU determines the size of the memory block.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Chipselect Interleaving

Whether memory blocks across the DRAM chip selects for node 0 are interleaved. This can be one of the following:

• Auto—The CPU automatically determines how to interleave chip selects.

• Disabled—Chip selects are not interleaved within the memory controller.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Bank Group Swap

Determines how physical addresses are assigned to applications. This can be one of the following:

• Auto—The CPU automatically determines how to assign physical addresses to applications.

• Disabled—Bank group swap is not used.

• Enabled—Bank group swap is used to improve the performance of applications.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Determinism Slider

Allows AMD processors to determine how to operate. This can be one of the following:

• Auto—The CPU automatically uses default power determinism settings.

• Performance—Processor operates at the best performance in a consistent manner.

• Power—Processor operates at the maximum allowable performance on a per die basis.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IOMMU

Input Output Memory Management Unit (IOMMU) allows AMD processors to map virtual addresses to physical addresses. This can be one of the following:

• Auto—The CPU determines how map these addresses.

• Disabled—IOMMU is not used.

• Enabled—Address mapping takes place through the IOMMU.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Downcore control

Allows AMD processors to disable cores and, thus, select how many cores to enable. This can be one of the following:

• FOUR (2+2)—Two cores enabled on each CPU complex.

• FOUR (4+0)—Four cores enabled on one CPU complex.

• SIX (3+3)—Three cores enabled on each CPU complex.

• THREE (3+0)—Three cores enabled on one CPU complex.

• TWO (1+1)—Two cores enabled on each CPU complex.

• TWO (2+0)—Two cores enabled on one CPU complex.

• Auto—The CPU determines how many cores need to be enabled.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SVM Mode

Whether the processor uses AMD Secure Virtual Machine Technology. This can be one of the following: This can be one of the following:

• Disabled—The processor does not use SVM Technology.

• Enabled—The processor uses SVM Technology.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SMT Mode

Whether the processor uses AMD Simultaneous MultiThreading Technology, which allows multithreaded software applications to execute threads in parallel within each processor. This can be one of the following:

• Auto—The processor allows for the parallel execution of multiple threads.

• Off—The processor does not permit multithreading.

• Platform Default —The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SMEE

Whether the processor uses the Secure Memory Encryption Enable (SMEE) function, which provides memory encryption support. This can be one of the following:

• Disabled—The processor does not use the SMEE function.

• Enabled—The processor uses the SMEE function.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

UPI Link Enablement

Enables the number of Ultra Path Interconnect (UPI) links required by the processor. This can be one of the following

• Auto—This is the default option.

• 1

• 2

UPI Power Manangement

The UPI power management can be used for conserving power on the server. This can be any of the following:

• Enabled—Enables the processor to support this functionality.

• Disabled—Disables the processor to support this functionality. This is the default option.

C1 Auto UnDemotion

Select whether to enable processors to automatically undemote from C1. This can be any of the following:

• Enabled—Enables the processor to support this functionality. This is the default option.

• Disabled—Disables the processor to support this functionality.

C1 Auto Demotion

If enabled, CPU automatically demotes to C1 based on un-core auto-demote information. This can be any of the following:

• Enabled—Enables the processor to support this functionality. This is the default option.

• Disabled—Disables the processor to support this functionality.

Intel VT for directed IO

Whether the processor uses Intel Virtualization Technology for Directed I/O (VT-d). This can be one of the following:

• Disabled—The processor does not use virtualization technology.

• Enabled—The processor uses virtualization technology.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Intel VTD interrupt Remapping

Whether the processor supports Intel VT-d Interrupt Remapping. This can be one of the following:

• Disabled—The processor does not support remapping.

• Enabled—The processor uses VT-d Interrupt Remapping as required.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Intel VTD coherency support

Whether the processor supports Intel VT-d Coherency. This can be one of the following:

• Disabled—The processor does not support coherency.

• Enabled—The processor uses VT-d Coherency as required.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Intel VTD ATS support

Whether the processor supports Intel VT-d Address Translation Services (ATS). This can be one of the following:

• Disabled—The processor does not support ATS.

• Enabled—The processor uses VT-d ATS as required.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Intel VTD pass through DMA support

Whether the processor supports Intel VT-d Pass-through DMA. This can be one of the following:

• Disabled—The processor does not support pass-through DMA.

• Enabled—The processor uses VT-d Pass-through DMA as required.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe ARI Support

The PCIe Alternative Routing ID (ARI) Interpretation feature specification supports greater numbers of virtual funtions through the implementation of ARI, which reinterprets the device number field in the PCIe header allowing for more than eight functions. This can be any of the following:

• Disabled—PCIe ARI Support is not available.

• Enabled—PCIe ARI Support is available.

• Auto—PCIe ARI Support is in auto mode. This is the default option.

IPv4 PXE Support

Enables or disables IPv6 support for PXE. This can be any of the following:

• Disabled—IPv6 PXE support is not available.

• Enabled—IPv6 PXE support is available. This is the default option.

IPv4 HTTP Support

Enables or disables IPv4 support for HTTP. This can be any of the following:

• Disabled—IPv4 HTTP support is not available.

• Enabled—IPv4 HTTP support is available. This is the default option.

IPv6 HTTP Support

Enables or disables IPv6 support for HTTP. This can be any of the following:

• Disabled—IPv6 HTTP support is not available.

• Enabled—IPv6 HTTP support is available. This is the default option.

Network Stack

This option allows you to monitor IPv6 and IPv4. This can be any of the following

• Disabled—Network Stack support is not available.

  Note	When disabled, the value set for IPV4 PXE Support does not impact the system.

• Enabled—Network Stack support is available. This is the default option.

Memory Thermal Throttling Mode

Provides a protective mechanism to ensure the memory temperature is within the limits. When the temperature exceeds the maximum threshold value, the memory access rate is reduced and Baseboard Management Controller (BMC) adjusts the fan to cool down the memory to avoid DIMM damage due to overheat. This can be one of the following:

• CLTT with PECI—Closed Loop Thermal Throttling (CLTT) with Platform Environment Control Interface (PECI). This is the default option.

• Disabled.

Advanced Memory Test

Enables enhanced memory tests during the system boot and increases the boot time based on the memory. This can be one of the following:

• Auto—This is the default option.

  Note	It is recommended to leave this setting in the default state of Auto.

• Enabled

• Disabled

Transparent Secure Memory Encryption (TSME)

Provides transparent hardware memory encryption of all data stored on system memory. This can be one of the following:

• Enabled

• Disabled

• Auto—This is the default option.

  Note	It is recommended to leave this setting in the default state of Auto to mitigate Rowhammer-style attacks.

Secure Encrypted Virtualization (SEV)

Enables running encrypted virtual machines (VMs) in which the code and data of the VM are isolated. This can be one of the following:

• 253 ASIDs

• 509 ASIDs

• Auto—This is the default option.

  Note	It is recommended to leave this setting in the default state of Auto to mitigate Rowhammer-style attacks.

DRAM SW Thermal Throttling

Provides a protective mechanism to ensure that the software functions within the temperature limits. When the temperature exceeds the maximum threshold value, the performance is permitted to drop allowing to cool down to the minimum threshold value. This can be one of the following:

• Enabled

• Disabled—This is the default option.

  Note	It is recommended to leave this setting in the default state of Disabled to mitigate Rowhammer-style attacks.

Memory Refresh Rate

Controls the refresh rate of the memory controller and might affect the memory performance and power depending on memory configuration and workload. This can be the following:

• 1x Refresh—This is the default option.

• 2x Refresh

Panic and High Watermark

Controls the delayed refresh capability of the memory controller. This can be one of the following:

• High—The memory controller is allowed to postpone up to a maximum of eight refresh commands. The memory controller executes all the postponed refreshes within the refresh interval. For the ninth refresh command, the refresh priority becomes Panic and the memory controller pauses the normal memory transactions until all the postponed refresh commands are executed.

• Low—This is the default option. The memory controller is not allowed to postpone refresh commands.

  Note	It is recommended to leave this setting in the default state (Low) which will help to reduce susceptibility to Rowhammer-style attacks.

Memory RAS configuration

How the memory reliability, availability, and serviceability (RAS) is configured for the server. This can be one of the following:

• Maximum Performance—Optimizes the system performance and disables all the advanced RAS features.

• Mirroring—System reliability is optimized by using half the system memory as backup. This mode is used for UCS M4 and lower blade servers.

• Lockstep—If the DIMM pairs in the server have an identical type, size, and organization and are populated across the SMI channels, you can enable lockstep mode to minimize memory access latency and provide better performance. Lockstep is enabled by default for B440 servers.

• Mirror Mode 1LM—Mirror Mode 1LM will set the entire 1LM memory in the system to be mirrored, consequently reducing the memory capacity by half. This mode is used for UCS M5 blade servers.

• Partial Mirror Mode 1LM—Partial Mirror Mode 1LM will set a part of the 1LM memory in the system to be mirrored, consequently reducing the memory capacity by half. This mode is used for UCS M5 blade servers.

• Sparing—System reliability is optimized by holding memory in reserve so that it can be used in case other DIMMs fail. This mode provides some memory redundancy, but does not provide as much redundancy as mirroring.

• ADDDC Sparing—System reliability is optimized by holding memory in reserve so that it can be used in case other DIMMs fail. This mode provides some memory redundancy, but does not provide as much redundancy as mirroring.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

NUMA optimized

Whether the BIOS supports NUMA. This can be one of the following:

• Disabled—The BIOS does not support NUMA.

• Enabled—The BIOS includes the ACPI tables that are required for NUMA-aware operating systems. If you enable this option, the system must disable Inter-Socket Memory interleaving on some platforms.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Select PPR Type Configuration

Post Package Repair (PPR) provides the ability to repair faulty memory cells by replacing them with spare cells. This can be one of the following:

• Disabled—The BIOS does not support selecting PPR Type.

• Hard PPR—This results in a permanent remapping of damaged storage cells.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Memory Size Limit in GB

Limits the capacity in Partial Memory Mirror Mode up to 50 percent of the total memory capacity. The memory size can range from 0 GB to 65535 GB in increments of 1 GB.

Mirroring Mode

Memory mirroring enhances system reliability by keeping two identical data images in memory.

This option is only available if you choose the mirroring option for Memory RAS Config. It can be one of the following:

• Inter-Socket—Memory is mirrored between two Integrated Memory Controllers (IMCs) across CPU sockets.

• Intra-Socket—One IMC is mirrored with another IMC in the same socket.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Sparing Mode

Sparing optimizes reliability by holding memory in reserve so that it can be used in case other DIMMs fail. This option provides some memory redundancy, but does not provide as much redundancy as mirroring. The available sparing modes depend on the current memory population.

This option is only available if you choose sparing option for Memory RAS Config. It can be one of the following:

• DIMM Sparing—One DIMM is held in reserve. If a DIMM fails, the contents of a failing DIMM are transferred to the spare DIMM.

• Rank Sparing—A spare rank of DIMMs is held in reserve. If a rank of DIMMs fails, the contents of the failing rank are transferred to the spare rank.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

LV DDR Mode

Whether the system prioritizes low voltage or high frequency memory operations. This can be one of the following:

• Auto—The CPU determines whether to prioritize low voltage or high frequency memory operations.

• Power Saving Mode—The system prioritizes low voltage memory operations over high frequency memory operations. This mode may lower memory frequency in order to keep the voltage low.

• Performance Mode—The system prioritizes high frequency operations over low voltage operations.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

DRAM Refresh Rate

The refresh interval rate for internal memory. This can be one of the following:

• 1x

• 2x

• 3x

• 4x

• Auto

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

DDR3 Voltage Selection

The voltage to be used by the dual-voltage RAM. This can be one of the following:

• DDR3-1500mv

• DDR3-1350mv

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Partial Memory Mirror Mode

Partial Memory Mirroring enables you to partially mirror by GB or by a percentage of the memory capacity. Depending on the option selected here, you can define either a partial mirror percentage or a partial mirror capacity in GB in available fields. You can partially mirror up to 50 percent of the memory capacity. It can be one of the following:

• Disabled—Partial Memory Mode is disabled. This is the default option.

• Percentage—The amount of memory to be mirrored in the Partial Memory Mode is defined as a percentage of the total memory.

• Value in GB—The amount of memory to be mirrored in the Partial Memory Mode is defined in GB.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Partial Mirrors 1-4 can be used in any number or configuration, provided they do not exceed the capacity limit set in GB or Percentage in the related options.

Partial Mirror Percentage

Limits the amount of available memory to be mirrored as a percentage of the total memory. This can range from 0.00 % to 50.00 % in increments of 0.01 %.

Partial Mirror1 Size in GB

Limits the amount of memory in Partial Mirror1 in GB. This can range from 0 GB to 65535 GB in increments of 1 GB.

Partial Mirror2 Size in GB

Limits the amount of memory in Partial Mirror2 in GB. This can range from 0 GB to 65535 GB in increments of 1 GB.

Partial Mirror3 Size in GB

Limits the amount of memory in Partial Mirror3 in GB. This can range from 0 GB to 65535 GB in increments of 1 GB.

Partial Mirror4 Size in GB

Limits the amount of memory in Partial Mirror4 in GB. This can range from 0 GB to 65535 GB in increments of 1 GB.

Burst and Postponed Refresh

Allows the memory controller to defer the refresh cycles when the memory is active and accomplishes the refresh within a specified window. The deferred refresh cycles may run in a burst of several refresh cycles. This can be any of the following:

• Enabled

• Disabled—This is the default option.

  Note	It is recommended to leave this setting in the default state of Disabled to mitigate Rowhammer-style attacks.

NVM Performance Setting

NVM Performance Setting enables efficient major mode arbitration between DDR and DDRT transactions on the DDR channel to optimize channel BW and DRAM latency.

Applies to all M5 and M6 servers.

The values can be one of the following:

• BW Optimized—Optimized for DDR and DDRT BW. This is the default option.

• Latency Optimized—Better DDR latency in the presence of DDRT BW.

• Balanced Profile—Optimized for Memory mode.

CR QoS

Prevents DRAM and overall system BW drop in the presence of concurrent DCPMM BW saturating threads, with minimal impact to homogenous DDRT-only usages, Good for multi-tenant use cases, VMs, etc. Targeted for App Direct, but also improves memory mode. Targets the “worst-case” degradations.

Applies to all M5 and M6 servers.

The values can be one of the following:

• Disabled—Feature disabled. This is the default option.

• Recipe 1—6 modules, 4 modules per socket optimized

• Recipe 2—2 modules per socket optimized

• Recipe 3—1 module per socket optimized

CR FastGo Config

CR FastGo Config improves DDRT non-temporal write bandwidth when FastGO is disabled. When FastGO is enabled, it gives faster flow of NT writes into the uncore, When FastGO is disabled, it lessens NT writes queueing up in the CPU uncore, thereby improving sequentially at DCPMM, resulting in improved bandwidth.

Applies to all M5 and M6 servers.

The values can be one of the following:

• Default—Enables FastGO.

• Option 1—Disables FastGO.

• Option 2, Option 3, Option 4, Option 5—Not applicable.

Snoopy mode for AD

Enables snoop-mode for DCPMM accesses while maintaining directory on all DRAM accesses. Snoops maintain cache coherence between sockets. Directory reduces snoops by keeping the remote node information locally (in memory). Directory lookups and updates add memory traffic.

Directory is a good tradeoff for DRAM, but not necessarily for DCPMM. For non-NUMA workload, when the feature is enabled, directory updates to DCPMM are eliminated, thereby helping DDRT bandwidth bound workloads. Directory is disabled for accesses to AD and instead snoops remote sockets to check for ownership. Directory is used only for DRAM accesses.

• Enabled

• Disabled This is the default option.

Snoopy mode for 2LM

Enables snoop-mode for DCPMM accesses while maintaining directory on all DRAM accesses. Snoops maintain cache coherence between sockets. Directory reduces snoops by keeping the remote node information locally (in memory). Directory lookups and updates add memory traffic.

Directory is a good tradeoff for DRAM, but not necessarily for DCPMM. For non-NUMA workload, when the feature is enabled, directory updates to DCPMM are eliminated, thereby helping DDRT bandwidth bound workloads. Directory is disabled for far memory accesses and instead snoops remote sockets to check for ownership. Directory is used only for DRAM (near memory).

• Enabled

• Disabled This is the default option.

Serial port A enable

Whether serial port A is enabled or disabled. This can be one of the following:

• Disabled—The serial port is disabled.

• Enabled—The serial port is enabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Make Device Non Bootable

Whether the server can boot from a USB device. This can be one of the following:

• Disabled—The server can boot from a USB device.

• Enabled—The server cannot boot from a USB device.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Legacy USB Support

Whether the system supports legacy USB devices. This can be one of the following:

• Disabled—USB devices are only available to EFI applications.

• Enabled—Legacy USB support is always available.

• Auto—Disables legacy USB support if no USB devices are connected.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

USB Idle Power Optimizing Setting

Whether the USB Idle Power Optimizing setting is used to reduce USB EHCI idle power consumption. Depending upon the value you choose, this setting can have an impact on performance. This can be one of the following:

• high-performanceHigh Performance—The USB System Idle Power Optimizing setting is disabled, because optimal performance is preferred over power savings.

  Selecting this option can significantly improve performance. We recommend you select this option unless your site has server power restrictions.

• Lower Idle Power—The USB System Idle Power Optimizing setting is enabled, because power savings are preferred over optimal performance.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

USB Front Panel Access Lock

USB front panel access lock is configured to enable or disable the front panel access to USB ports. This can be one of the following:

• Disabled

• Enabled

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Port 60/64 Emulation

Whether the system supports 60h/64h emulation for complete USB keyboard legacy support. This can be one of the following:

• Disabled—60h/64 emulation is not supported.

• Enabled—60h/64 emulation is supported.

  You should select this option if you are using a non-USB aware operating system on the server.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

USB Port Front

Whether the front panel USB devices are enabled or disabled. This can be one of the following:

• Disabled—Disables the front panel USB ports. Devices connected to these ports are not detected by the BIOS and operating system.

• Enabled—Enables the front panel USB ports. Devices connected to these ports are detected by the BIOS and operating system.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

USB Port Internal

Whether the internal USB devices are enabled or disabled. This can be one of the following:

• Disabled—Disables the internal USB ports. Devices connected to these ports are not detected by the BIOS and operating system.

• Enabled—Enables the internal USB ports. Devices connected to these ports are detected by the BIOS and operating system.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

USB Port KVM

Whether the vKVM ports are enabled or disabled. This can be one of the following:

• Disabled—Disables the KVM keyboard and/or mouse devices. Keyboard and/or mouse will not work in the KVM window.

• Enabled—Enables the KVM keyboard and/or mouse devices.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

USB Port Rear

Whether the rear panel USB devices are enabled or disabled. This can be one of the following:

• Disabled—Disables the rear panel USB ports. Devices connected to these ports are not detected by the BIOS and operating system.

• Enabled—Enables the rear panel USB ports. Devices connected to these ports are detected by the BIOS and operating system.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

USB Port SD Card

Whether the SD card drives are enabled or disabled. This can be one of the following:

• Disabled—Disables the SD card drives. The SD card drives are not detected by the BIOS and operating system.

• Enabled—Enables the SD card drives.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

USB Port VMedia

Whether the virtual media devices are enabled or disabled. This can be one of the following:

• Disabled—Disables the vMedia devices.

• Enabled—Enables the vMedia devices.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

All USB Devices

Whether all physical and virtual USB devices are enabled or disabled. This can be one of the following:

• Disabled—All USB devices are disabled.

• Enabled—All USB devices are enabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

xHCI Mode

Whether xHCI mode is enabled or disabled. This can be one of the following:

• Disabled—xHCI mode is disabled.

• Enabled—xHCI mode is enabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Maximum memory below 4GB

Whether the BIOS maximizes memory usage below 4GB for an operating system without PAE support, depending on the system configuration. This can be one of the following:

• Disabled—Does not maximize memory usage. Choose this option for all operating systems with PAE support.

• Enabled—Maximizes memory usage below 4GB for an operating system without PAE support.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Memory mapped IO above 4GB

Whether to enable or disable memory mapped I/O of 64-bit PCI devices to 4GB or greater address space. Legacy option ROMs are not able to access addresses above 4GB. PCI devices that are 64-bit compliant but use a legacy option ROM may not function correctly with this setting enabled. This can be one of the following:

• Disabled—Does not map I/O of 64-bit PCI devices to 4GB or greater address space.

• Enabled—Maps I/O of 64-bit PCI devices to 4GB or greater address space.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

VGA Priority

Allows you to set the priority for VGA graphics devices if multiple VGA devices are found in the system. This can be one of the following:

• Onboard—Priority is given to the onboard VGA device. BIOS post screen and OS boot are driven through the onboard VGA port.

• Offboard—Priority is given to the PCIE Graphics adapter. BIOS post screen and OS boot are driven through the external graphics adapter port.

• Onboard VGA Disabled—Priority is given to the PCIE Graphics adapter, and the onboard VGA device is disabled.

  Note	The vKVM does not function when the onboard VGA is disabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

ASPM Support

Allows you to set the level of ASPM (Active Power State Management) support in the BIOS. This can be one of the following:

• Disabled—ASPM support is disabled in the BIOS.

• Auto—The CPU determines the power state.

• ForceL0—Force all links to L0 standby (L0s) state.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

BME DMA Mitigation Support

Allows you to disable the PCI BME bit to mitigate the threat from an unauthorized external DMA. This can be one of the following:

• Disabled—PCI BME bit is disabled in the BIOS.

• Enabled—PCI BME bit is enabled in the BIOS.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

QPI Link Frequency Select

The Intel QuickPath Interconnect (QPI) link frequency, in megatransfers per second (MT/s). This can be one of the following:

• 6.4 GT/s

• 7.2 GT/s

• 8.0 GT/s

• 9.6 GT/s

• Auto—The CPU determines the QPI link frequency.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

QPI Snoop Mode

This can be one of the following:

• Home Snoop—The snoop is always spawned by the home agent (centralized ring stop) for the memory controller. This mode has a higher local latency than early snoop, but it provides extra resources for a larger number of outstanding transactions.

• Cluster On Die—This mode is available only for processors that have 10 or more cores. It is the best mode for highly NUMA optimized workloads.

• Home Directory Snoop with OSB

• Early Snoop—The distributed cache ring stops can send a snoop probe or a request to another caching agent directly. This mode has lower latency and it is best for workloads that have shared data sets across threads and can benefit from a cache-to-cache transfer, or for workloads that are not NUMA optimized.

• Auto —The CPU determines the QPI Snoop mode.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Trusted Platform Module (TPM)

Whether to enable or disable the Trusted Platform Module (TPM), which is a component that securely stores artifacts that are used to authenticate the server. This can be one of the following:

• Disabled—Disables TPM.

• Enabled—Enables TPM.

• Platform Default—Enables TPM.

Trusted Execution Technology (TXT)

Whether to enable or disable Intel Trusted Execution Technology (TXT), which provides greater protection for information that is used and stored on the business server. This can be any of the following:

• Disabled—Disables TXT.

• Enabled—Enables TXT.

• Platform Default—Disables TXT.

When you only enable TXT, it implicitly enables TPM, VT, and VTDio.

SHA-1 PCR Bank

The Platform Configuration Register (PCR) is a memory location in the TPM. Multiple PCRs are collectively referred to as a PCR bank. A Secure Hash Algorithm 1 or SHA-1 PCR Bank allows to enable or disable TPM security. This can be any of the following:

• Disabled—Disables SHA-1 PCR Bank.

• Enabled—Enables SHA-1 PCR Bank. This is the default option.

SHA-256 PCR Bank

The Platform Configuration Register (PCR) is a memory location in the TPM. Multiple PCRs are collectively referred to as a PCR bank. A Secure Hash Algorithm 256-bit or SHA-256 PCR Bank allows to enable or disable TPM security. This can be any of the following:

• Disabled—Disables SHA-256 PCR Bank.

• Enabled—Enables SHA-256 PCR Bank. This is the default option.

PCIe Slot SAS OptionROM

Whether Option ROM is available on the SAS port. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe Slot n Link Speed

This option allows you to restrict the maximum speed of an adapter card installed in PCIe slot n. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Auto—The maximum speed is set automatically.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe Slot n OptionROM

Whether Option ROM is available on the port. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe Slot HBA OptionROM

Whether Option ROM is available on the HBA port. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe Slot MLOM OptionROM

Whether Option ROM is available on the MLOM port. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe Slot Nx OptionROM

Whether Option ROM is available on the port. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe 10G LOM 2 Link

Whether Option ROM is available on the 10G LOM port. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCI ROM CLP

PCI ROM Command Line Protocol (CLP) controls the execution of different Option ROMs such as PxE and iSCSI that are present in the card. By default, it is disabled.

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SIOC1 Option ROM

Whether the server can use Option ROM present in System IO Controller 1 (SIOC1). This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SIOC2 Option ROM

Whether the server can use Option ROM present in System IO Controller 2 (SIOC2). This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SBMEZZ1 Option ROM

Whether the server can use Option ROM present in SBMezz1 controller. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SBMEZZ2 Option ROM

Whether the server can use Option ROM present in SBMezz2 controller. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IOESlot1 OptionROM

Whether option ROM is enabled on the IOE slot 1. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IOEMEZZ 1 OptionROM

Whether option ROM is enabled on the IOE Mezz1. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IOE Slot2 Option ROM

Whether option ROM is enabled on the IOE slot 2. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IO ENVME1 Option ROM

Whether option ROM is enabled on the IOE NVMe1. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IO ENVME2 Option ROM

Whether option ROM is enabled on the IOE NVMe2. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SBNVME1 Option ROM

Whether the server can use Option ROM present in SBNVMe1 controller. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe Slot MRAID-n OptionROM

Whether Option ROM is available on the MRAID port. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe Slot RAID OptionROM

Whether Option ROM is available on the RAID port. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe Slot Rear Nvmen OptionRom

Whether Option ROM is available on the Rear NVMEn port. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Rear NVMEn Link Speed

This option allows you to restrict the maximum speed of an NVME card installed in the rear PCIe slot n. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Enabled—The maximum speed is restricted.

• Auto—The maximum speed is set automatically.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Front NVMEn Link Speed

This option allows you to restrict the maximum speed of an NVME card installed in the front PCIe slot. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Auto—The maximum speed is set automatically.

• Enabled—The maximum speed is restricted.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

HBA Link Speed

This option allows you to restrict the maximum speed of an HBA card. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Auto—The maximum speed is set automatically.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

MLOM Link Speed

This option allows you to restrict the maximum speed of an MLOM adapter. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Auto—The maximum speed is set automatically.

• Disabled—The maximum speed is not restricted.

• Enabled—The maximum speed is restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

MRAID Link Speed

This option allows you to restrict the maximum speed of MRAID. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Auto—The maximum speed is set automatically.

• Enabled—The maximum speed is not restricted.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

RAID-n Link Speed

This option allows you to restrict the maximum speed of RAID. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Auto—The maximum speed is set automatically.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

All Onboard LOM

Whether all onboard LOM ports are enabled or disabled. This can be one of the following:

• Enabled—All onboard LOM are enabled.

• Disabled—All onboard LOM are disabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

LOM Port 1 OptionRom

Whether Option ROM is available on the LOM port 1. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

LOM Port 2 OptionRom

Whether Option ROM is available on the LOM port 2. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Slot n State

The state of the adapter card installed in PCIe slot n. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SBNVMe1 OptionROM

Whether the server can use Option ROM present in SBNVMe1 controller. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SBNVMe2 OptionROM

Whether the server can use Option ROM present in SBNVMe2 controller. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SIOCNVMe1 OptionROM

Whether the server can use Option ROM present in SIOCNVMe1 controller. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SIOCNVMe2 OptionROM

Whether the server can use Option ROM present in SIOCNVMe2 controller. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SBLom1 OptionROM

Whether the server can use Option ROM present in the SBLom1 controller. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• UEFI Only—The expansion slot is available for UEFI only.

• Legacy Only—The expansion slot is available for legacy only.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SBNVMen Link Speed

Link speed for SBNVMe slot n. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Enabled—The maximum speed is restricted.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SIOCNVMen Link Speed

Link speed for SIOCNVMe slot n. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Enabled—The maximum speed is restricted.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SIOCn Link Speed

Link speed for SIOC slot n. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Enabled—The maximum speed is restricted.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SBMezzn Link Speed

Link speed for SBMezz slot n. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Enabled—The maximum speed is restricted.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IOESlotn Link Speed

Link speed for IOE slot n. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Enabled—The maximum speed is restricted.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IOEMezzn Link Speed

Link speed for IOEMezz slot n. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Enabled—The maximum speed is restricted.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IOENVMen Link Speed

Link speed for IOENVMe slot n. This can be one of the following:

• Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

• Gen 2—5GT/s is the maximum speed allowed.

• Gen 3—8GT/s is the maximum speed allowed.

• Enabled—The maximum speed is restricted.

• Disabled—The maximum speed is not restricted.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

CDN Support for LOMs

Whether the Ethernet Networking Identifier naming convention is according to Consistent Device Naming (CDN) or the traditional way of naming conventions. This can be one of the following:

• Enabled—OS Ethernet Network Identifier is named in a consistent device naming (CDN) convention according to the physical LAN on Motherboard (LOM) port numbering; LOM Port 0, LOM Port 1 and so on.

• Disabled—OS Ethernet Networking Identifier is named in a default convention as ETH0, ETH1 and so on. By default, CDN option is disabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

VMD Enable

Whether NVMe SSDs that are connected to the PCIe bus can be hot swapped. It also standardizes the LED status light on these drives. LED status lights can be optionally programmed to display specific Failure indicator patterns.

This can be one of the following:

• Enabled—Hot swap of NVMe SSDs that are connected to the PCIe bus is allowed.

• Disabled—Hot swap of NVMe SSDs that are connected to the PCIe bus is not allowed.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

ACS Control SLOT-n

n = 11 to 14

Access Control Services (ACS) allow the processor to enable or disable peer-to-peer communication between multiple devices for Control Slot n. This can be one of the following:

• Enabled— Enables peer-to-peer communication between multiple devices for Control Slot n.

• Disabled— Disables peer-to-peer communication between multiple devices for Control Slot n.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe Slot GPUn OptionROM

Only for Cisco UCS C480 M5 ML Server

Whether the Option ROM is enabled on GPU slot n. n is the slot number, which can be numbered 1 through 8. This can be one of the following:

• Disabled—The expansion slot is not available.

• Enabled—The expansion slot is available.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

ACS Control GPU-n

n = 1 to 8

Access Control Services (ACS) allow the processor to enable or disable peer-to-peer communication between multiple devices for GPUs. This can be one of the following:

• Disabled— Enables peer-to-peer communication between multiple devices for GPUs.

• Enabled— Disables peer-to-peer communication between multiple devices for GPUs.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

PCIe PLL SSC

Reduces EMI interference by down-spreading the clock by 0.5%.

Disable this feature to centralize the clock without spreading.

For all Cisco UCS M5 servers, this option is Disabled by default.

• Disabled— Clock is centralized without spreading.

• Auto— EMI interference is auto adjusted.

• ZeroPointFive— EMI interference us reduced by down-spreading the clock by 0.5%.

• Platform Default — The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Integrated Graphics

Enables integrated graphics. This can be one of the following:

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Integrated Graphics Aperture Size

Allows you to set the size of mapped memory for the integrated graphics controller. This can be one of the following:

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Onboard Graphics

Enables onboard graphics (KVM). This can be one of the following:

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Boot option retry

Whether the BIOS retries NON-EFI based boot options without waiting for user input. This can be one of the following:

• disabled—Waits for user input before retrying NON-EFI based boot options.

• enabled—Continually retries NON-EFI based boot options without waiting for user input.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SAS RAID

Whether the Intel SAS Entry RAID Module is enabled. This can be one of the following:

• disabled—The Intel SAS Entry RAID Module is disabled.

• enabled—The Intel SAS Entry RAID Module is enabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

SAS RAID module

How the Intel SAS Entry RAID Module is configured. This can be one of the following:

• it-ir-raid—Configures the RAID module to use Intel IT/IR RAID.

• intel-esrtii—Configures the RAID module to use Intel Embedded Server RAID Technology II.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Onboard SCU Storage Support

Whether the onboard software RAID controller is available to the server. This can be one of the following:

• disabled—The software RAID controller is not available.

• enabled—The software RAID controller is available.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Cool Down Time (sec) drop-down list

The time to wait (in seconds) before the next boot attempt. This can be one of the following:

• 15System waits for 15v seconds before the next boot attempt.

• 45

• 90

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

This token is valid only when the Boot Option Retry token has been enabled.

Number of Retries drop-down list

Number of attempts to boot. This can be one of the following:

• InfiniteSystem tries all options to boot up.

• 13System tries 5 times to boot up

• 5

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

P-SATA mode drop-down list

This options allows you to select the P-SATA mode. This can be one of the following:

• Disabled—P-SATA mode is disabled.

• LSI SW RAID—Sets both SATA and sSATA controllers to RAID mode for LSI SW RAID.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Power On Password drop-down list

This token requires that you set a BIOS password before using the F2 BIOS configuration. If enabled, password needs to be validated before you access BIOS functions such as IO configuration, BIOS set up, and booting to an operating system using BIOS. It can be one of the following:

• Disabled—Power On Password is disabled.

• Enabled—Power On Password is enabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

IPV6 PXE Support drop-down list

Enables or disables IPV6 support for PXE. This can be one of the following

• Disabled—IPV6 PXE support is not available.

• Enabled—IPV6 PXE support is always available.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Adaptive Memory Training drop-down list

When this token is enabled, the BIOS saves the memory training results (optimized timing/voltage values) along with CPU/memory configuration information and reuses them on subsequent reboots to save boot time. The saved memory training results are used only if the reboot happens within 24 hours of the last save operation. This can be one of the following:

• Disabled—Adaptive Memory Training is disabled.

• Enabled—Adaptive Memory Training is enabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

BIOS Tech Message Level Control (for C125 M5)

Enabling this token allows the BIOS Tech log output to be controlled at more a granular level. This reduces the number of BIOS Tech log messages that are redundant, or of little use. This can be one of the following:

• Disabled—BIOS Techlog Level is disabled.

• Enabled—BIOS Techlog Level is enabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

OptionROM Launch Optimization

The Option ROM launch is controlled at the PCI Slot level, and is enabled by default. In configurations that consist of a large number of network controllers and storage HBAs having Option ROMs, all the Option ROMs may get launched if the PCI Slot Option ROM Control is enabled for all. However, only a subset of controllers may be used in the boot process. When this token is enabled, Option ROMs are launched only for those controllers that are present in boot policy. This can be one of the following:

• Disabled—OptionROM Launch Optimization is disabled.

• Enabled—OptionROM Launch Optimization is enabled.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Assert NMI on SERR

Whether the BIOS generates a non-maskable interrupt (NMI) and logs an error when a system error (SERR) occurs. This can be one of the following:

• Disabled—The BIOS does not generate an NMI or log an error when a SERR occurs.

• Enabled—The BIOS generates an NMI and logs an error when a SERR occurs. You must enable this setting if you want to enable Assert NMI on PERR.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Assert NMI on PERR

Whether the BIOS generates a non-maskable interrupt (NMI) and logs an error when a processor bus parity error (PERR) occurs. This can be one of the following:

• Disabled—The BIOS does not generate an NMI or log an error when a PERR occurs.

• Enabled—The BIOS generates an NMI and logs an error when a PERR occurs. You must enable Assert NMI on SERR to use this setting.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

OS Boot Watchdog Timer

Whether the BIOS programs the watchdog timer with a predefined timeout value. If the operating system does not complete booting before the timer expires, the CIMC resets the system and an error is logged. This can be one of the following:

• Disabled—The watchdog timer is not used to track how long the server takes to boot.

• Enabled—The watchdog timer tracks how long the server takes to boot. If the server does not boot within the predefined length of time, the CIMC resets the system and logs an error.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

This feature requires either operating system support or Intel Management software.

OS Boot Watchdog Timer Policy

What action the system takes if the watchdog timer expires. This can be one of the following:

• Power Off—The server is powered off if the watchdog timer expires during OS boot.

• Reset—The server is reset if the watchdog timer expires during OS boot.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

This option is only available if you enable the OS Boot Watchdog Timer.

OS Boot Watchdog Timer Timeout

What timeout value the BIOS uses to configure the watchdog timer. This can be one of the following:

• 5-minutes—The watchdog timer expires 5 minutes after the OS begins to boot.

• 10-minutes—The watchdog timer expires 10 minutes after the OS begins to boot.

• 15-minutes—The watchdog timer expires 15 minutes after the OS begins to boot.

• 20-minutes—The watchdog timer expires 20 minutes after the OS begins to boot.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

This option is only available if you enable the OS Boot Watchdog Timer.

FRB-2 Timer

Whether the FRB-2 timer is used to recover the system if it hangs during POST. This can be one of the following:

• Disabled—The FRB-2 timer is not used.

• Enabled—The FRB-2 timer is started during POST and used to recover the system if necessary.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Console redirection

Allows a serial port to be used for console redirection during POST and BIOS booting. After the BIOS has booted and the operating system is responsible for the server, console redirection is irrelevant and has no effect. This can be one of the following:

• Disabled—No console redirection occurs during POST.

• serial-port-a or COM 0 or Enabled—Enables serial port A for console redirection during POST. This option is valid for blade servers and rack-mount servers.

• serial-port-b or COM 1—Enables serial port B for console redirection and allows it to perform server management tasks. This option is only valid for rack-mount servers.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Flow Control

Whether a handshake protocol is used for flow control. Request to Send / Clear to Send (RTS/CTS) helps to reduce frame collisions that can be introduced by a hidden terminal problem. This can be one of the following:

• None—No flow control is used.

• RTS-CTS—RTS/CTS is used for flow control.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Baud rate

What Baud rate is used for the serial port transmission speed. If you disable Console Redirection, this option is not available. This can be one of the following:

• 9.6k—A 9600 Baud rate is used.

• 19.2k—A 19200 Baud rate is used.

• 38.4k—A 38400 Baud rate is used.

• 57.6k—A 57600 Baud rate is used.

• 115.2k—A 115200 Baud rate is used.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Terminal type

What type of character formatting is used for console redirection. This can be one of the following:

• PC-ANSI—The PC-ANSI terminal font is used.

• VT100—A supported vt100 video terminal and its character set are used.

• VT100-PLUS—A supported vt100-plus video terminal and its character set are used.

• VT-UTF8—A video terminal with the UTF-8 character set is used.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Legacy OS redirection

Whether redirection from a legacy operating system, such as DOS, is enabled on the serial port. This can be one of the following:

• Disabled—The serial port enabled for console redirection is hidden from the legacy operating system.

• Enabled— The serial port enabled for console redirection is visible to the legacy operating system.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Putty KeyPad

set console-redir-config putty-function-keypad

Allows you to change the action of the PuTTY function keys and the top row of the numeric keypad. This can be one of the following:

• VT100—The function keys generate ESC OP through ESC O[.

• LINUX—Mimics the Linux virtual console. Function keys F6 to F12 behave like the default mode, but F1 to F5 generate ESC [[A through ESC [[E.

• XTERMR6—Function keys F5 to F12 behave like the default mode. Function keys F1 to F4 generate ESC OP through ESC OS, which are the sequences produced by the top row of the keypad on Digital terminals.

• SCO—The function keys F1 to F12 generate ESC [M through ESC [X. The function and shift keys generate ESC [Y through ESC [j. The control and function keys generate ESC [k through ESC [v. The shift, control and function keys generate ESC [w through ESC [{.

• ESCN—The default mode. The function keys match the general behavior of Digital terminals. The function keys generate sequences such as ESC [11~ and ESC [12~.

• VT400—The function keys behave like the default mode. The top row of the numeric keypad generates ESC OP through ESC OS.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Out of Band Management

Used for Windows Special Administration Control (SAC). This option allows you to configure the COM port 0 that can be used for Windows Emergency Management services. ACPI SPCR table is reported based on this setup option. This can be one of the following:

• Disabled—Configures the COM port 0 as a general purpose port for use with the Windows Operating System.

• Enabled—Configures the COM port 0 as a remote management port for Windows Emergency Management services.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Redirection After BIOS POST

Whether BIOS console redirection should be active after BIOS POST is complete and control given to the OS bootloader. This can be one of the following:

• Always Enable—BIOS Legacy console redirection is active during the OS boot and run time.

• Bootloader—BIOS Legacy console redirection is disabled before giving control to the OS boot loader.

• Platform Default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

OS Watchdog Timer Policy

Whether the FRB2 timer is used for recovering the system if it hangs during POST. This can be any of the following:

• Disabled—The FRB2 timer is not used.

• Enabled—The FRB2 timer is started during POST and used to recover the system if necessary. This is the default option.