66 Intel® Server System SR1680MV Service Guide
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Table 10. CPU Configuration Submenu
BIOS Setup Utility
Main Advanced Boot Security Exit
Configure advanced CPU settings
Table 11. CPU Configuration Submenu Fields
Menu Fields Settings Description
Advanced/Configure adva nced CPU settings
Ratio CMOS Setting 19* Sets the ratio between CPU core clock and the
FSB frequency.
Hardware Prefetcher Disabled
Enabled*
For UP platforms, leave it enabled. For DP/MP
servers, it may use to tune performance to the
specific application.
Adjacent Cache Line
Prefetch Disabled
Enabled*
For UP platforms, leave it enabled. For DP/MP
servers, it may use to tune performance to the
specific application.
Max CPUID Value Limit Disabled*
Enabled
Disabled for Microsoft Windows XP*
Intel(R) Virtualization
Tech Disabled*
Enabled
When enabled, a VMM can utilize the additional
HW Caps. Provided by Intel(R) Virtualization
Tech. Note: A full reset is required to change
the setting.
Execute-Disable Bit
Capability Disabled
Enabled
When disabled, force the XD feature flag to
always return 0.
Intel(R) HT Technology Disabled*
Enabled
When “Disabled” only one thread per enabled
core is enabled.
Active Processor Cores All*
1
2
Number of cores to enable in each processor
package.
A20M Disabled*
Enabled
Legacy operating systems and APs may need
A20M enabled.
Intel(R) SpeedStep(tm)
tech Disabled
Enabled*
Disable: Disable GV3
Enable: Enable GV3
Intel(R) C-STATE tech Disabled*
Enabled
CState: CPU idle is set to C2/C3/C4