Asus Rampage II Extreme - Manual (Page 108)

3-26 Chapter 3: BIOS setup
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]
Allows you to enable or disable Enhanced Halt State support.
Configuration options: [Disabled] [Enabled]
Hardware Prefetcher [Enabled]
Allows you to enable or disable the Hardware Prefetcher function.
Configuration options: [Disabled] [Enabled]
Adjacent Cache Line Prefetch [Enabled]
Allows you to enable or disable the Adjacent Cache Line Prefetch function.
Configuration options: [Disabled] [Enabled]
Intel(R) Virtualization Tech [Enabled]
The Intel ® Virtualization Technology allows a hardware platform to run multiple
operating systems separately and simultaneously, enabling one system to virtually
function as several systems. Configuration options: [Disabled] [Enabled]
CPU TM Function [Enabled]
This function enables the overheated CPU to throttle the clock speed to cool down.
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]
Intel(R) HT Technology [Enabled]
Allows you to enable or disable the Intel Hyper-Threading Technology function.
When disabled, only one thread per activated core is enabled.
Configuration options: [Enabled] [Disabled]
Active Processor Cores [All]
Allows you to choose the number of CPU cores to activate in each processor
package. Configuration options: [All] [1] [2]
A20M [Disabled]
Legacy OSes and APs may need A20M enabled.
Configuration options: [Disabled] [Enabled]