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System Setup 93
Primary
Video
(PEG
default)
This setting specifies which video controller is primary, PCI
or PEG. PEG is the appropriate setting for a PCI Express
graphics card or cards.
Performance
SpeedStep
(Off default)
Enables Intel
®
SpeedStep
®
for all supported processors in
the computer. This setting changes the processor power
consumption and frequency.
NOTE: This option may not be available on your computer.
VT for Direct
I/O
(Off default)
Specifies whether a virtual monitor (VMM) can use
additional hardware capabilities provided by Intel
Virtualization Technology for direct I/O.
Virtualization
(Off default)
Specifies whether a virtual machine monitor (VMM) can
utilize the additional hardware capabilities provided by
Intel Virtualization technology.
Limit CPUID
Value
(Off default)
Limits the max value the processor standard CPUID
function will support. Some operating systems won’t
complete installation when the max CPUID function
supported is greater than 3.
HDD Acoustic
Mode
Optimizes the hard drive’s performance and acoustic
levels.
• Bypass - do nothing (needed for older drives)
• Quiet - slower, but quieter
• Suggested - allows the drive manufacturer to select mode
• Performance - faster, but noisier
Snoop Filter When enabled, the Snoop filter typically improves
performance by reducing snoop traffic on the frontside
bus in dual processor configurations.
ACL Prefetch When enabled, the Adjacent Cache Line Prefetcher
fetches both cache lines that comprise a cache line pair
when it determines required data is not currently in its
cache. When disabled, the processor will only fetch the
cache line required by the processsor.