UEFI Secure Boot drop-down list

Allows you to enable to disable UEFI Secure Boot.

Boot Mode

Displays the current boot mode.

Configure one time boot device drop-down list

Allows you to choose the desired boot source.

Reboot Host Immediately checkbox

If the Reboot Host Immediately check box is checked, the server is rebooted immediately and the new BIOS settings go into effect. Otherwise the changes are saved until the server is manually rebooted.

Current Boot Order Area list

Displays the current boot order.

Expected Boot Order list

You can rearrange the boot order of any component by dragging items within this list.

Reboot Host Immediately checkbox

If the Reboot Host Immediately check box is checked, the server is rebooted immediately and the new BIOS settings go into effect. Otherwise the changes are saved until the server is manually rebooted.

PCIE Link Speed Capability drop-down list

Determines the maximum speed at which the PCI Express interface can operate.

• Auto—Automatically selects the optimal PCI Express link speed based on the capabilities of the connected device and system requirements.

• GEN1—Sets the PCI Express link to operate at the first generation speed, which is 2.5 GT/s (gigatransfers per second).

• GEN2—Configures the PCI Express link to run at the second generation speed of 5.0 GT/s.

• GEN3—Establishes the PCI Express link speed at the third generation, which is 8.0 GT/s.

• GEN4—Operates the PCI Express link at the fourth generation speed of 16.0 GT/s.

• GEN5—Sets the PCI Express link to the fifth generation speed, which is 32.0 GT/s, providing the highest bandwidth among the listed options.

PCIe Ten Bit Tag Support drop-down list

Enables the use of an extended tag field in PCIe transactions to improve identification and routing efficiency for devices that support it. This can be one of the following:

• Disabled—Turns off ten-bit tag support, using standard tag bits.

• Enabled—Forces ten-bit tag support for compatible devices, enhancing transaction identification.

• Auto—Automatically manages the ten-bit tag support based on system compatibility.

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.

IPv6 HTTP Support drop-down list

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

• Disabled—IPv6 HTTP support is not available.

• Enabled—IPv6 HTTP support is always available.

PCIe ARI Support drop-down list

Enables the use of Alternative Routing-ID Interpretation to allow more efficient device addressing by expanding the number of functions per device beyond the standard limit.

• Auto—Automatically configures ARI (Alternative Routing-ID Interpretation) support based on system compatibility.

• Disable—Turns off ARI support, using standard routing ID interpretation.

• Enable—Forces ARI support, allowing more efficient routing ID assignments for compatible devices.

IPv4 PXE Support drop-down list

Enables or disables IPv4 support for PXE. This can be one of the following

• Disabled—IPv4 PXE support is not available.

• Enabled—IPv4 PXE support is always available.

IPv4 HTTP Support drop-down list

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

• Disabled—IPv4 HTTP support is not available.

• Enabled—IPv4 HTTP support is always available.

SR-IOV Support drop-down list

SR-IOV feature allows a PCIe device to appear to be multiple separate physical PCIe devices. This can be one of the following:

• Disabled—SR-IOV feature is disabled.

• Enabled—SR-IOV feature is enabled.

Reboot Host Immediately checkbox

If the Reboot Host Immediately check box is checked, the server is rebooted immediately and the new BIOS settings go into effect. Otherwise the changes are saved until the server is manually rebooted.

FRB-2 Timer drop-down list

Whether the FRB2 timer is used to recover the system if it hangs during POST. This can be one 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.

OS Wtd Timer Timeout field

If OS does not boot within the specified time, OS watchdog timer expires and system takes action according to timer policy. Enter an integer between 1 and 30.

Console Redirection drop-down list

Allows a serial port to be used for console redirection during POST and BIOS booting. After the OS has booted, console redirection is irrelevant. This can be one of the following:

• Enabled—Enables console redirection during POST.

• Disabled—No console redirection occurs during POST.

Terminal Type drop-down list

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.

OS Watchdog Timer drop-down list

Whether the BIOS programs the watchdog timer with a specified timeout value. 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 length of time specified in the OS Boot Watchdog Timer Timeout field, the Cisco IMC logs an error and takes the action specified in the OS Boot Watchdog Policy field.

OS Wtd Timer Policy drop-down list

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

• Do Nothing—No action is taken if the watchdog timer expires during OS boot, allowing the system to continue its current state without intervention.

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

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

• Power Cycle—The server is turned off and then back on if the watchdog timer expires during OS boot, effectively rebooting the system to address potential issues.

Bits per second drop-down list

This setting determines the data transmission speed in bits per second (bps) for serial communication. It defines the rate at which data is sent and received over a communication channel.

• 9600

• 19200

• 38400

• 57600

• 115200

• 230400

• 460800

• 921600

Flow Control drop-down list

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.

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

Reboot Host Immediately checkbox

If the Reboot Host Immediately check box is checked, the server is rebooted immediately and the new BIOS settings go into effect. Otherwise the changes are saved until the server is manually rebooted.

Password protection of Runtime Variables drop-down list

This feature secures runtime variables by requiring a password for access or modification. It enhances system security by preventing unauthorized changes to critical settings during operation.

• Enabled—Requires a password to access or modify runtime variables, adding a layer of security to prevent unauthorized changes to system settings.

• Disabled—Allows runtime variables to be accessed and modified without a password, which may be suitable for environments where security is less of a concern.

Security Device Support drop-down list

This option allows you to control the Security Device support for the system. This can be one of the following:

• Disabled—The option is disabled.

• Enabled—The server is disabled.

SHA256 PCR Bank drop-down list

Enable or Disable SHA256 PCR Bank. This can be one of the following:

• Disabled—The server does not use this feature.

• Enabled—The server uses this feature.

TPM State drop-down list

This feature controls the status of the Trusted Platform Module (TPM), a hardware-based security device used to enhance system security by providing secure storage for cryptographic keys and performing platform integrity checks.

• Enabled—Activates the TPM, allowing it to perform security functions such as key management and system integrity verification.

• Disabled—Deactivates the TPM, preventing it from performing its security-related tasks.

Pending operation drop-down list

Trusted Platform Module (TPM) Pending Operation option allows you to control the status of the pending operation. This can be one of the following:

• None—No action.

• TpmClear—Clears the pending operations.

SHA384 PCR Bank drop-down list

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 384-bit or SHA-384PCR Bank allows to enable or disable TPM security.

This can be one of the following:

• Disabled—The server does not use this feature.

• Enabled—The server uses this feature.

Reboot Host Immediately checkbox

If the Reboot Host Immediately check box is checked, the server is rebooted immediately and the new BIOS settings go into effect. Otherwise the changes are saved until the server is manually rebooted.

L1 Burst Prefetch Mode drop-down list

This setting controls the prefetching behavior for Level 1 (L1) cache, which can enhance processing efficiency by loading data in advance.

• Enable—Activates burst prefetching, potentially improving performance by preloading data into the L1 cache.

• Disable—Deactivates burst prefetching, which might reduce performance but can save power and reduce unnecessary data fetching.

• Auto—Automatically manages the L1 burst prefetching based on system workload and conditions to optimize performance and efficiency.

IOMMU drop-down list

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.

Chipselect Interleaving drop-down list

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

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

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

DRAM Refresh Rate drop-down list

This setting determines the interval at which DRAM cells are refreshed to maintain data integrity. A lower refresh rate can improve performance but may increase power consumption, while a higher rate can enhance data retention. This can be one of the following:

• 3.9 usec

• 1.95 usec

DDR Healing BIST drop-down list

It is a diagnostic tool used to identify and repair memory faults within DDR memory modules. By executing a series of self-tests, the system can detect faulty cells and attempt to restore functionality, thereby enhancing memory reliability and performance.

• Disabled—Disables the DDR Healing BIST functionality, preventing any memory diagnostic tests from running.

• PMU Mem BIST—Enables the Performance Monitoring Unit-based memory Built-In Self-Test for fault detection.

• Self-Healing Mem BIST—Activates self-healing capabilities to automatically detect and repair memory faults.

• PMU and Self-Healing Mem BIST—Combines both PMU-based and self-healing tests for comprehensive memory diagnostics and repair.

TSME drop-down list

Allows you to enable Transparent Secure Memory Encryption (TSME). This can be one of the following:

• Auto—Feature usage is set to auto.

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

• Enabled—The processor uses the TSME function.

NUMA nodes per socket drop-down list

Allows you to configure the memory NUMA domains per socket. This can be one of the following:

• Auto—Number of channels is set to auto.

• NPS0—One NUMA node per system.

• NPS1—One NUMA node per socket.

• NPS2—Two NUMA nodes per socket, one per Left/Right Half of the SoC.

• NPS4—Four NUMA nodes per socket, one per Quadrant.

SEV-SNP Support drop-down list

Allows you to enable Secure Nested Paging feature. This can be one of the following:

• Disabled—The processor does not use the SEV-SNP function.

• Enabled—The processor uses the SEV-SNP function.

• Auto—Automatically enables SEV-SNP features based on system capabilities and requirements, optimizing security for virtual machines without manual configuration.

BME DMA Mitigation drop-down list

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.

SMEE drop-down list

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

• Auto—The CPU determines how map these addresses.

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

• Enabled—The processor uses the SMEE function.

DRAM Boot Time Post Package Repair drop-down list

This option allows the system to attempt repairs on DRAM during the boot process to correct any detected faults, ensuring memory integrity and reliability.

• '—Activates the boot time repair process, allowing the system to identify and fix memory issues during startup.

• Disabled—Disables the boot time repair process, skipping any automatic DRAM fault correction during system startup.

BankSwapMode drop-down list

Allows you to control the swapping of memory banks to optimize performance or manage specific memory configurations. It can be useful for improving memory access patterns or adapting to hardware requirements.

• Auto—Automatically selects the optimal bank swapping configuration based on system requirements and capabilities.

• Disable—Prevents any bank swapping, maintaining the memory bank configuration as initially set without modifications.

• Swap CPU—Enables memory bank swapping specifically tailored to optimize CPU performance and access patterns.

DRAM Scrub Time drop-down list

Select a value to indicate the number of hours to scrub the entire memory. This can be one of the following:

• Auto — Feature is set to auto mode.

• Disabled — Support is disabled.

• 1 hour

• 4 hours

• 8 hours

• 16 hours

• 24 hours

• 48 hours

DRAM Runtime Post Package Repair drop-down list

This is a specific configuration setting related to the system's ability to perform repairs on the processor's package during runtime.

• Disabled—The processor does not use the function.

• Enabled—The processor uses the function.

SNP Memory (RMP Table) Coverage drop-down list

Allows you to configure SNP memory coverage. This can be one of the following:

• Auto—System decides the memory coverage.

• Disabled—The processor does not use this function.

• Enabled—This feature is enabled.

• Custom—Custom size can be defined in SNP Memory Size to Cover.

Memory interleaving drop-down list

Allows for disabling memory interleaving. Note that NUMA nodes per socket will be honored regardless of this setting. This can be one of the following:

• Auto—Feature is set to auto mode.

• Enabled—This feature is enabled.

• Disabled—Support is disabled.

Above 4G Decoding drop-down list

Enables or disables MMIO above 4GB or not. This can be one of the following:

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

• Enabled—The server maps I/O of 64-bit PCI devices to 4GB or greater address space. Note PCI devices that are 64-bit compliant but use a legacy option ROM may not function correctly with this setting enabled.

Reboot Host Immediately checkbox

If the Reboot Host Immediately check box is checked, the server is rebooted immediately and the new BIOS settings go into effect. Otherwise the changes are saved until the server is manually rebooted.

SVM Mode drop-down list

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.

AVX512 drop-down list

AVX512 BIOS setting enables or disables the use of AVX512 instruction set extensions, which are advanced vector extensions used by certain Intel® processors to improve performance for heavy computational tasks.

Adjusting this setting can affect compatibility and stability with some software, as well as influence CPU power consumption and heat output.

Enable or disable AVX512. This can be one of the following:

• Auto—Set to auto mode.

• Disabled—Feature is disabled.

• Enabled—Feature is enabled.

Global C-state Control drop-down list

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.

DF PState Frequency Optimizer drop-down list

Allows you to optimize the frequency states (PStates) of the Data Fabric (DF) in a processor to improve performance and power efficiency. This can be one of the following:

• Auto—Automatically adjusts the DF PStates based on system requirements and workload to balance performance and power usage.

• Disable—Turns off the optimization, maintaining the default PStates configuration without adjustments.

• Enable—Actively optimizes DF PStates for enhanced performance, potentially increasing power consumption.

xGMI Force Link Width drop-down list

Allows you to configure the link width of the xGMI (Infinity Fabric) interconnect, which is responsible for data transfer between processors and other components in AMD systems.

• Auto—Automatically determines the optimal link width based on system configuration and workload, balancing performance and stability.

• 0—Sets the link width to the minimum, potentially reducing power consumption but also limiting data transfer rates.

• 1—Configures the link width to a moderate level, offering a balance between performance and power efficiency.

• 2—Sets the link width to the maximum, providing the highest data transfer rates for demanding applications but possibly increasing power usage.

SMT Control drop-down list

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.

• Disabled—The processor does not use SMT Mode.

• Enabled—The processor uses SMT Mode.

3-link xGMI max speed drop-down list

The option enables xGMI link speed. This can be one of the following:

• Auto—Set to auto mode.

• 20Gbps—Set to 20Gbps.

• 25Gbps—Set to 25Gbps.

• 32Gbps—Set to 32Gbps.

APBDIS drop-down list

Allows you to select the APB Disable value for the SMU. This can be one of the following:

• 0—Clear ApbDis to SMU

• 1—Set ApbDis to SMU.

• Auto—The CPU determines the value.

DownCore Mode drop-down list

Configures the number of active processor cores to optimize performance and power consumption according to workload requirements.

• Enablement Option—Allows selection from predefined configurations of active cores, simplifying the process of optimizing core usage for specific performance or power goals.

• Bitmap—Enables custom selection of active cores through a bitmap, providing precise control over which cores are enabled or disabled for tailored performance tuning.

Streaming Stores Control drop-down list

Enables the streaming stores functionality. This can be one of the following:

• Auto—Set to auto mode.

• Disabled—Feature is disabled.

• Enabled—Feature is enabled.

Power Down Enable drop-down list

This setting controls whether the memory (RAM) can enter a low power state when the system is idle or during periods of low usage. Enabling this setting typically allows the RAM to consume less power, potentially saving energy and reducing heat output, while disabling it keeps the RAM fully powered for possibly quicker wake-up times at the expense of higher power consumption. This can be one of the following:

• Auto—Set to auto mode.

• Disabled—Feature is disabled.

• Enabled—Feature is enabled.

CCD Control drop-down list

Allows you to specify the number of CCDs that are desired to be enable in the system. This can be one of the following:

• Auto—The maximum CCDs provided by the processor is enabled.

• 2 CCDs

• 3 CCDs

• 4 CCDs

• 6 CCDs

Local APIC Mode drop-down list

This feature configures the mode of the Local Advanced Programmable Interrupt Controller (APIC), which manages interrupt signaling and prioritization within the CPU. This can be one of the following:

• Auto—Set to auto mode.

• XAPIC—Set to XAPIC mode.

• X2APIC—Set to X2APIC mode.

ACPI SRAT L3 Cache As NUMA Domain drop-down list

Creates a layer of virtual domains on top of the physical domains in which each CCX is declared to be in its on domain. This can be one of the following:

• Auto—Set to auto mode.

• Disabled—Use NPS settings for domain configuration.

• Enabled— Each CCX is declared to be in its own domain.

Reboot Host Immediately checkbox

If the Reboot Host Immediately check box is checked, the server is rebooted immediately and the new BIOS settings go into effect. Otherwise the changes are saved until the server is manually rebooted.

Core Performance Boost drop-down list

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.

L1 Stream HW Prefetcher drop-down list

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.

Determinism Enable drop-down list

This feature allows the system to manage resource allocation and performance characteristics to achieve consistent outcomes based on the selected mode.

• Power—Optimizes the system to prioritize power efficiency while maintaining predictable performance levels.

• Performance—Configures the system to maximize performance consistency, potentially at the expense of higher power consumption.

CPPC drop-down list

Collaborative Processor Performance Control (CPPC) allows the operating system and the processor to collaborate more effectively in managing performance and power efficiency.

• Auto—Automatically configures CPPC based on system and workload characteristics to optimize performance and power usage.

• Disable—Turns off CPPC, reverting to default performance management without collaborative adjustments.

• Enable—Activates CPPC to allow dynamic performance scaling and enhanced power management through collaboration between the OS and processor.

Global C-state Control drop-down list

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.

L2 Stream HW Prefetcher drop-down list

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.

Power Profile Selection drop-down list

Allows you to choose a predefined power and performance configuration for their system, balancing between energy efficiency and performance according to the selected profile.

• High Performance Mode—Maximizes system performance, prioritizing speed and responsiveness over power efficiency. Ideal for demanding applications and workloads that require maximum computing power.

• Efficiency Mode—Ideal for systems where energy savings are crucial, such as in battery-operated devices or environments with power constraints.

• Maximum IO Performance Mode—Recommended for data-intensive applications, such as databases and high-speed networking tasks, where I/O performance is critical.

• Balanced Memory Performance Mode—Suitable for typical computing tasks that require efficient memory usage without compromising too much on energy efficiency.