Asus P5E - Manual (Page 90)

4-24 Chapter 4: BIOS setup
Ratio CMOS Setting: [9]
Allows you to set the ratio between the CPU Core Clock and the FSB
Frequency. Use <+> and <-> to adjust the value.
Configuration options: [ 6] [ 7] [ 8] [ 9]
The options vary depending on the CPU you install.
C1E Support [Enabled]
Allows you to enable or disable C1E Support.
Configuration options: [Disabled] [Enabled]
CPU TM function [Enabled]
Configuration options: [Disabled] [Enabled]
Vanderpool Technology [Enabled]
Configuration options: [Disabled] [Enabled]
Execute Disable Bit [Enabled]
Allows you to enable or disable the No-Execution Page Protection Technology.
Setting this item to [Disabled] forces the XD feature flag to always return to zero
(0). Configuration options: [Disabled] [Enabled]
Max CPUID Value Limit [Disabled]
Setting this item to [Enabled] allows legacy operating systems to boot even without
support for CPUs with extended CPUID functions.
Configuration options: [Disabled] [Enabled]
The following item appears only when you set the CPU Ratio Control item to
[Auto].
Intel(R) SpeedStep (TM) Tech. [Enabled]
Configuration options: [Disabled] [Enabled]