26 | Chapter 3: BIOS Setup
CPU Configuration
Active Processor Cores
This item sets number of cores to enable in each processor package.
Options: All (Default) / 1
Limit CPUID Maximum
When the computer is booted up, the operating system executes the CPUID instruction to
identify the processor and its capabilities. Before it can do so, it must first query the processor
to find out the highest input value CPUID recognizes. This determines the kind of basic
information CPUID can provide the operating system.
Options: Disabled (Default) / Enabled
Execute-Disable Bit
XD can prevent certain classes of malicious buffer overflow attacks when combined with a
supporting OS (Windows Server 2003 SP1, Windows XP SP2, SuSE Linux 9.2, RedHat Enterprise
3 Update 3.).
Options: Enabled (Default) / Disabled
Hardware Prefetcher
The processor has a hardware prefetcher that automatically analyzes its requirements 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.
Options: Enabled (Default) / 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.
Options: Enabled (Default) / Disabled
Intel Virtualization Technology
Virtualization Technology can virtually separate your system resource into several parts, thus
enhance the performance when running virtual machines or multi interface systems.
Options: Enabled (Default) / Disabled
