Asus H61M-K - Manual (Page 58)

2-16 Chapter 2: Getting started
Active Processor Cores [All]
Allows you to choose the number of CPU cores to activate in each processor package.
Configuration options: [All] [1] [2] [3]
Limit CPUID Maximum [Disabled]
[Enabled] Allows legacy operating systems to boot even without support for CPUs
with extended CPUID functions.
[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 Virtualization Technology [Disabled]
[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.
Hardware Prefetcher [Enabled]
[Disabled] Disables this function.
[Enabled] Allows you to turn on /off the Mid Level Cache (L2) streamer prefetcher.
Adjacent Cache Line Prefetch [Enabled]
[Disabled] Disables this function.
[Enabled] Allows a hardware platform to perform adjacent cache line prefetching.