Hi-Fi Z77S/ Hi-Fi H77S UEFI BIOS Manual
9
Limit CPUID Max imum
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
Intel Virtualization Tech
Virtualization Technology can virtually separate your system resource into
several parts, thus enhance the performance when running virtual machines
or multi interface systems.
Options: Disabled (Default) / Enabled
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 latenc y associated with memo ry reads.
Options: Enabled (Default) / Disabled
Adjacent Cache Line Prefetch
The processo r has a hard ware adjacent cac he 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
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