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Intel® Workstation Board S5520SC TPS BIOS Setup Utility
Revision 1.7
Intel order number: E39530-010
75
Setup Item Options Help Text Comments
Intel® Virtualization
Technology
Enabled
Disabled
Intel® Virtualization Technology allows a
platform to run multiple operating systems
and applications in independent partitions.
Note: A change to this option requires the
system to be powered off and then back on
before the setting takes effect.
Intel® Virtualization
Technology for Directed
I/O
Enabled
Disabled
Enable/Disable Intel® Virtualization Technology
for Directed I/O.
Report the I/O device assignment to VMM
through DMAR ACPI Tables
Interrupt Remapping Enabled
Disabled
Enable/Disable Intel® VT-d Interrupt
Remapping support.
Only appears when Intel®
Virtualization Technology for
Directed I/O is enabled.
Coherency Support
Enabled
Disabled
Enable/Disable Intel® VT-d Coherency support.
Only appears when Intel®
Virtualization Technology for
Directed I/O is enabled.
ATS Support Enabled
Disabled
Enable/Disable Intel® VT-d Address Translation
Services (ATS) support.
Only appears when Intel®
Virtualization Technology for
Directed I/O is enabled.
Pass-through DMA
Support
Enabled
Disabled
Enable/Disable Intel® VT-d Pass-through DMA
support.
Only appears when Intel®
Virtualization Technology for
Directed I/O is enabled.
Hardware Prefetcher Enabled
Disabled
Hardware Prefetcher is a speculative prefetch
unit within the processor(s).
Note: Modifying this setting may affect
system performance.
Adjacent Cache Line
Prefetch
Enabled
Disabled
[Enabled] - Cache lines are fetched in pairs
(even line + odd line).
[Disabled] - Only the current cache line
required is fetched.
Note: Modifying this setting may affect
system performance.
Direct Cache Access (DCA)
Enabled
Disabled
Allows processors to increase the I/O
performance by placing data from I/O devices
directly into the processor cache.
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