Intel Turbo Boost Technology |
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:
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Disabled—The processor does not increase its frequency automatically.
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Enabled—The processor utilizes Turbo Boost Technology if required.
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Enhanced Intel Speedstep Technology |
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:
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Disabled—The processor never dynamically adjusts its voltage or frequency.
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Enabled—The processor utilizes Enhanced Intel SpeedStep Technology and enables all supported processor sleep states to further conserve power.
We recommend that you contact your operating system vendor to make sure the operating system supports this feature. |
Intel Hyper-Threading Technology |
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:
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Disabled—The processor does not permit hyperthreading.
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Enabled—The processor allows for the parallel execution of multiple threads.
We recommend that you contact your operating system vendor to make sure the operating system supports this feature. |
Number of Enabled Cores |
Allows you to disable one or more of the physical cores on the server. This can be one of the following:
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All—Enables all physical cores. This also enables Hyper Threading on the associated logical processor cores.
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1 through n—Specifies the number of physical processor cores that can run on the server. Each physical core has an associated logical core. To disable Hyper Threading and have only one logical processor core running on the server, select 1.
We recommend that you contact your operating system vendor to make sure the operating system supports this feature. |
Execute Disable |
Classifies memory areas on the server to specify where 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:
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Disabled—The processor does not classify memory areas.
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Enabled—The processor classifies memory areas.
We recommend that you contact your operating system vendor to make sure the operating system supports this feature. |
Intel Virtualization Technology |
Whether the processor uses Intel Virtualization Technology (VT), which allows a platform to run multiple operating systems and applications in independent partitions. This can be one of the following:
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Disabled—The processor does not permit virtualization.
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Enabled—The processor allows multiple operating systems in independent partitions.
Note |
If you change this option, you must power cycle the server before the setting takes effect. |
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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:
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Disabled—The processor does not use virtualization technology.
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Enabled—The processor uses virtualization technology.
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Intel VT-d Interrupt Remapping |
Whether the processor supports Intel VT-d Interrupt Remapping. This can be one of the following:
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Disabled—The processor does not support remapping.
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Enabled—The processor uses VT-d Interrupt Remapping as required.
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Intel VT-d Coherency Support |
Whether the processor supports Intel VT-d Coherency. This can be one of the following:
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Disabled—The processor does not support coherency.
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Enabled—The processor uses VT-d Coherency as required.
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Intel VT-d Address Translation Services |
Whether the processor supports Intel VT-d Address Translation Services (ATS). This can be one of the following:
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Disabled—The processor does not support ATS.
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Enabled—The processor uses VT-d ATS as required.
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Intel VT-d PassThrough DMA |
Whether the processor supports Intel VT-d Pass-through DMA. This can be one of the following:
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Disabled—The processor does not support pass-through DMA.
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Enabled—The processor uses VT-d Pass-through DMA as required.
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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:
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Disabled—Data from I/O devices is not placed directly into the processor cache.
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Enabled—Data from I/O devices is placed directly into the processor cache.
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Processor C3 Report |
Whether the BIOS sends the C3 report to the operating system. When the OS receives the report, it can transition the processor into the lower C3 power state to decrease energy usage while maintaining optimal processor performance. This can be one of the following:
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Disabled—The BIOS does not send the C3 report.
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ACPI C2—The BIOS sends the C3 report using the ACPI C2 format, allowing the OS to transition the processor to the C3 low power state.
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ACPI C3—The BIOS sends the C3 report using the ACPI C3 format, allowing the OS to transition the processor to the C3 low power state.
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Processor C6 Report |
Whether the BIOS sends the C6 report to the operating system. When the OS receives the report, it can transition the processor into the lower C6 power state to decrease energy usage while maintaining optimal processor performance. This can be one of the following:
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Disabled—The BIOS does not send the C6 report.
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Enabled—The BIOS sends the C6 report, allowing the OS to transition the processor to the C6 low power state.
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CPU Performance |
Sets the CPU performance profile for the server. The performance profile consists of the following options:
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Data Reuse Optimization
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DCU Streamer Prefetcher
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DCU IP Prefetcher
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Hardware Prefetcher
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Adjacent Cache-Line Prefetch
This can be one of the following:
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Enterprise—Only the DCU IP Prefetcher is enabled. The rest of the options are disabled.
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High Throughput—All options are enabled.
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HPC—Data Reuse Optimization is disabled and all other options are enabled. This setting is also known as high performance computing.
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Custom—All performance profile options can be configured from the BIOS setup on the server. In addition, the Hardware Prefetcher and Adjacent Cache-Line Prefetch options can be configured in the fields below.
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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:
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Disabled—The hardware prefetcher is not used.
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Enabled—The processor uses the hardware prefetcher when cache issues are detected.
Note |
CPU Performance must be set to Custom in order to specify this value. For any value other than Custom, this option is overridden by the setting in the selected CPU performance profile. |
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Adjacent Cache-Line Prefetch |
Whether the processor fetches cache lines in even/odd pairs instead of fetching just the required line. This can be one of the following:
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Disabled—The processor only fetches the required line.
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Enabled— The processor fetches both the required line and its paired line.
Note |
CPU Performance must be set to Custom in order to specify this value. For any value other than Custom, this option is overridden by the setting in the selected CPU performance profile. |
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CPU C State |
Whether the system can enter a power savings mode during idle periods. This can be one of the following:
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Disabled—The system remains in high performance state even when idle.
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Enabled—The system can reduce power to system components such as the DIMMs and CPUs. The amount of power reduction is specified in the Package C State Limit field.
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C1E |
Whether the CPU transitions to its minimum frequency when entering the C1 state. This can be one of the following:
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Disabled—The CPU continues to run at its maximum frequency in C1 state.
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Enabled—The CPU transitions to its minimum frequency. This option saves the maximum amount of power in C1 state.
Note |
This option is used only if CPU C State is enabled. |
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Spread Spectrum |
Spread Spectrum modulates the pulses produced by the clock on the motherboard in order to reduce the EMI (Electromagnetic Interference) generated by those pulses. This can be one of the following:
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Disabled— The server does not use the spread spectrum function.
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Enabled— The server uses the spread spectrum function.
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OEM AESNI |
Whether the server uses the AES-NI encryption instruction set that improves on the Advanced Encryption Standard (AES) algorithm. This can be one of the following:
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Disabled—The server only uses AES encryption.
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Enabled—The server uses AES-NI encryption when possible.
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