Technical Product Specification

4BBIOS Setup Utility Intel® Server Board S5520UR and S5520URT TPS
Intel order number E44031-012 Revision 1.9
62
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.