Supermicro SYS-5038A-IL Manuel d'utilisateur télécharger pdf (Page 89)

Chapter 7: BIOS

7-7

Clock Spread Spectrum

If this feature is set to Enabled, the BIOS will monitor the level of Electromagnetic

Interference caused by the components and will attempt to reduce the interference

whenever needed. The options are Enabled and Disabled.

Hyper-threading

Select Enabled to support Intel Hyper-threading Technology to enhance CPU per-

formance. The options are Enabled and Disabled.

Active Processor Cores

This feature determines how many CPU cores will be activated for each CPU. When

all is selected, all cores in the CPU will be activated. (Please refer to Intel's web

site for more information.) The options are All, 1, 2, and 3.

Limit CPUID Maximum

Select Enabled to set the maximum CPU ID value and to boot the legacy operat-

ing systems that cannot support processors with extended CPUID functions. The

options are Enabled and Disabled (for the Windows OS).

Execute-Disable Bit Capability (Available if supported by the OS & the CPU)

Set to Enabled to enable the Execute Disable Bit which will allow the processor

to designate areas in the system memory where an application code can execute

and where it cannot, thus preventing a worm or a virus from ﬂ ooding illegal codes

to overwhelm the processor or damage the system during an attack. The default is

Enabled. (Refer to Intel and Microsoft Web Sites for more information.)

Intel® Virtualization Technology (Available when supported by the CPU)

Select Enabled to use the Intel Virtualization Technology to allow one platform to

run multiple operating systems and applications in independent partitions, creat-

ing multiple "virtual" systems in one physical computer. The options are Enabled

and Disabled.

Hardware Prefetcher (Available when supported by the CPU)

If set to Enabled, the hardware prefetcher will prefetch streams of data and instruc-

tions from the main memory to the L2 cache to improve CPU performance. The

options are Disabled and Enabled.

Adjacent Cache Line Prefetch (Available when supported by the CPU)

Select Enabled for the CPU to prefetch both cache lines for 128 bytes as comprised.

Select Disabled for the CPU to prefetch both cache lines for 64 bytes. The options

are Disabled and Enabled.

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Supermicro SYS-5038A-IL Manuel d'utilisateur Page 89