Asus P5S-MX SE Manual page 68

Hardware Prefetcher [Enabled]
Enables or disables the Hardware Prefetcher feature.
Configuration options: [Disabled] [Enabled]
Adjacent Cache Line Prefetch [Enabled]
Enables or disables the Adjacent Cache Line Prefetch feature.
Configuration options: [Disabled] [Enabled]
Max CPUID Value Limit [Disabled]
Enable this item to boot legacy operating systems that cannot support CPUs with
extended CPUID functions.
Configuration options: [Disabled] [Enabled]
Execute Disable Bit [Enabled]
Allows you to Enable/disable Execute Disable Function.
Configuration options: [Disabled] [Enabled]
2-20 Chapter 2: BIOS setup