MSI X2-109 v2 User Manual

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BIOS Setup

C1E Support

When the C1E Support (Enhanced Halt Powerdown State) is enabled, the proc-

essor will transition to a lower core to bus ratio and lower voltage ID driven by

the processor to the voltage regulator before entering Halt Powerdown State

(C1). Not all porcessors support Enhanced Halt Powerdown State (C1E).

Har dware Prefetcher

The processor has a hardware prefetcher that automatically analyzes its re-

quirements and prefetches data and instructions from the memory into the

Level 2 cache that are likely to be required in the near future. This reduces the

latency associated with memory reads. When enabled, the processor's hard-

ware prefetcher will be enabled and allowed to automatically prefetch data and

code for the processor. When disabled, the processor's hardware prefetcher

will be disabled.

Adjacent Cache Line Prefetch

The processor has a hardware adjacent cache line prefetch mechanism that

automatically fetches an extra 64-byte cache line whenever the processor

requests for a 64-byte cache line. This reduces cache latency by making the

next cache line immediately available if the processor requires it as well. When

enabled, the processor will retrieve the currently requested cache line, as well

as the subsequent cache line. When disabled, the processor will only retrieve

the currently requested cache line.

Max CPUID Value Limit

The Max CPUID Value Limit BIOS feature allows you to circumvent problems

with older operating systems that do not support the Intel Pentium 4 processor

with Hyper-Threading Technology. W hen enabled, the processor will limit the

maximum CPUID input value to 03h when queried, even if the processor sup-

ports a higher CPUID input value. When disabled, the processor will return the

actual maximum CPUID input value of the processor when queried.

Intel(R) Virtualization Tech

Virtualization enhanced by Intel Virtualization Technology will allow a platform

to run multiple operating systems and applications in independent partitions.

With virtualization, one computer system can function as multiple “virtual” systems.

CPU TM /Thermal Throttle

Thermal Management throttles the processor back as it reaches its maximum

operating temperature. Throttling reduces the number of processing cycles,

thereby diminishing the heat dissipation of the CPU. This cools the unit. Once the

CPU has reached a safe operating temperature, thermal throttling is automati-

cally disabled, and normal full speed processing begins again.

Execute Disable Bit Capability

Intel's Execute Disable Bit functionality can prevent certain classes of malicious

"buffer overflow" attacks when combined with a supporting operating system.

This functionality allows the processor to classify areas in memory by where

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