35 ASMB-784 User Manual
Chapter 3 BIOS Operation
3.3.4 CPU Configuration
Figure 3.8 CPU Configuration
Hyper-threading
This item allows you to enable or disable Intel Hyper Threading technology.
Active Processor Core
Use this to select how many processor cores you want to activate when you are
using a dual or quad core processor.
Overclocking lock
This item is to enable or disabled FLEX_RATIO(194) MSR.
Limit CPUID Maximum
Setting this item to [Enable] allows legacy operating systems to boot even without
support for CPUs with extended CPUID functions.
Execute Disable Bit
This item specifies the Execute Disable Bit Feature. The settings are Enabled and
Disabled. The Optimal and Fail-Safe default setting is Enabled. If Disabled is
selected, the BIOS forces the XD feature flag to always return to 0.
Intel Virtualization Technology
This feature is used to enable or disable the Intel Virtualization Technology (IVT)
extension. It allows multiple operating systems to run simultaneously on the same
system. It does this by creating virtual machines, each running its own x86 operating
system.
Hardware Prefetcher
Hardware Prefetcher is a technique that fetches instructions and/or data from mem-
ory into the CPU cache memory well before the CPU needs it, so that it can improve
the load-to-use latency. You may choose to enable or disable it.
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