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Intel VT for Directed I/O (VT-d)
Intel VT for Directed I/O
Enable or Disable Intel Virtualization Technology for Directed I/O. This
reports the I/O device assignment to VMM through DMAR ACPI tables.
Interrupt Remapping
Interrupt remapping allows VMM to route device interrupts to the VM that
controls the device.
QPI Configuration QPI General Configuration
(Quick Path Interconnect)
QPI Status
This screen displays the Number of CPUs, Number of IIO, LInk Speed,
Current QPI Link Frequency, QPI Global MMIO Low Base/Limit, QPI Global
MMIO High Base/Limit, and QPI PCI-E Configuration Base/Siz (Size).
Link Frequency Select
Use this feature to select the desired frequency for QPI Link connections. The
options are 6.4GB/s, 8.0GB/s, 9.6GB/s, Auto, and Auto Limited.
Link L0p Enable
Select Enable for Link L0p support. The options are Enable and Disable.
Link L1 Enable
Select Enable for Link L1 support. The options are Enable and Disable.
COD Enable
This setting allows you to cluster on Die mode, which targets NUMA workloads
where sharing across Caching Agents is less important than latency. The
options are Enable and Disable.
Early Snoop
Early Snoop mode is best for workloads with high cache to cache transfers
or for workloads that are not fully NUMA optimized. It requires memory
population on all channels. The options are Enable, Disable, and Auto.
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Chapter 7: AMI BIOS
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