Supermicro X9DRW-7TPF+ User Manual download pdf (Page 85)

Chapter 4: AMI BIOS

4-7

Active Processor Cores

Set to Enabled to use a processor's second core and above. (Please refer to Intel's

website for more information.) The options are All, 1, 2, 4, and 6.

Limit CPUID Maximum

This feature is used to set the maximum CPU ID value. Enable this function to boot

the legacy operating systems that cannot support processors with extended CPUID

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

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

Select 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 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

AES-NI

Select Enable to use the Intel Advanced Encryption Standard (AES) New Instruc-

tions (NI) to ensure data security. The options are Enabled and Disabled.

MLC Streamer Prefetcher (Available when supported by the CPU)

If set to Enabled, the MLC (mid-level cache) streamer prefetcher will prefetch

streams of data and instructions from the main memory to Level 2 (L2) Cache to

improve CPU performance. The options are Disabled and Enabled.

MLC Spatial Prefetch (Available when supported by the CPU)

If this feature is set to Disabled, the MLC (mid-level cache) spatial prefetcher will

prefetch the cache line for 64 bytes. If this feature is set to Enabled, the MLC

(mid-level cache) spatial prefetcher will prefetch both cache lines for 128 bytes as

comprised. The options are Disabled and Enabled.

DCU Streamer Prefetcher (Available when supported by the CPU)

Select Enabled to support Data Cache Unit (DCU) prefetch of L1 data to speed

up data accessing and processing in the DCU to enhance CPU performance. The

options are Disabled and Enabled.

DCU IP Prefetcher

Select Enabled for DCU (Data Cache Unit) IP Prefetcher support, which will prefetch

IP addresses to improve network connectivity and system performance. The options

are Enabled and Disabled.

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Supermicro X9DRW-7TPF+ User Manual Page 85