Asus P7P55D Premium - Manual (Page 84)

3-20 Chapter 3: BIOS setup
Chapter 3
CPU Ratio Setting [Auto]
Allows you to adjust the ratio between CPU Core Clock and BCLK Frequency. Use the <+>
and <-> keys to adjust the value. The valid value ranges differently according to your CPU
model.
C1E Support [Enabled]
[Enabled] Enables the C1E support function. This item should be enabled in order to
enable the Enhanced Halt Sate.
[Disabled] Disables this function.
Hardware Prefetcher [Enabled]
[Enabled] Enables the Hardware Prefetcher function. This item should be enabled
in order to enable the L2 cache (MLC) Streamer Prefetcher for tuning
performance of the specific application.
[Disabled] Disables this function.
Adjacent Cache Line Prefetcher [Enabled]
[Enabled] Enables the Adjacent Cache Line Prefetcher function. This item should be
enabled in order to enable the L2 cache (MLC) Spatial Prefetcher for tuning
performance of the specific application.
[Disabled] Disables this function.
Max CPUID Value Limit [Disabled]
[Enabled] Allows legacy operating systems to boot even without support for CPUs
with extended CPUID functions.
[Disabled] Disables this function.
Intel(R) Virtualization Tech [Enabled]
[Enabled] Allows a hardware platform to run multiple operating systems separately
and simultaneously, enabling one system to virtually function as several
systems.
[Disabled] Disables this function.
CPU TM function [Enabled]
[Enabled] Enables the overheated CPU to throttle its clock speed to cool down.
[Disabled] Disables this function.
Execute Disable Bit Capability [Enabled]
[Enabled] Enables the No-Execution Page Protection Technology.
[Disabled] Forces the XD feature flag to always return to zero (0).
Intel(R) HT Technology [Enabled]
This item appears only when you install a CPU that supports Intel Hyper-Threading
Technology.
[Enabled]
Enables the Intel Hyper-Threading Technology.
[Disabled] Only one thread per activated CPU core is enabled.