Dell Precision T5400 User's Guide - Page 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) VT for Direct I/O (Off default) Virtualization (Off default) Limit CPUID Value (Off default) HDD Acoustic Mode Snoop Filter ACL Prefetch 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. Specifies whether a virtual monitor (VMM) can use additional hardware capabilities provided by Intel Virtualization Technology for direct I/O. Specifies whether a virtual machine monitor (VMM) can utilize the additional hardware capabilities provided by Intel Virtualization technology. 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. 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 When enabled, the Snoop filter typically improves performance by reducing snoop traffic on the frontside bus in dual processor configurations. 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. System Setup 93