Asus P7P55D C1E Support [Enabled], CPU Ratio Setting [Auto], CPU TM function [Enabled], Hardware Prefetcher [Enabled], Execute Disable Bit [Enabled]

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 [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]

[Enabled]	Enables the Intel Hyper-Threading Technology.
[Disabled]	Only one thread per activated CPU core is enabled.

Chapter 3

ASUS P7P55D 3-21