Chapter 6: BIOS
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North Bridge
This feature allows the user to configure the settings for the Intel North Bridge.
UPI (Ultra Path Interconnect) Configuration
This section displays the following UPI General Configuration information:
•
Number of CPU
•
Number of IIO
•
Current UPI Link Speed
•
Current UPI Link Frequency
•
UPI Global MMIO Low Base/Limit
•
UPI Global MMIO High Base/Limit
•
UPI PCI-E Configuration Base/Size
Degrade Precedence
Use this feature to select the degrading precedence option for Ultra Path Interconnect
connections. Select Topology Precedent to degrade UPI features if system options are in
conflict. Select Feature Precedent to degrade UPI topology if system options are in conflict.
The options are
Topology Precedence
and Feature Precedence.
Link L0p Enable
Select Enable to enable Link L0p. The options are Disable, Enable, and
Auto
.
Link L1 Enable
Select Enable to enable Link L1 (Level 1 link). The options are Disable, Enable, and
Auto
.
IO Directory Cache (IODC)
Select Enable for the IODC (I/O Directory Cache) to generate snoops instead of generating
memory lockups for remote IIO (InvIToM) and/or WCiLF (Cores). Select Auto for the
IODC to generate snoops (instead of memory lockups) for WCiLF (Cores). The options
are Disable,
Auto
, Enable for Remote InvItoM Hybrid Push, InvItoM AllocFlow, Enable for
Remote InvItoM Hybrid AllocNonAlloc and Enable for Remote InvItoM and Remote WViLF.
SNC
Sub NUMA Clustering (SNC) is a feature that breaks up the Last Level Cache (LLC) into
clusters based on address range. Each cluster is connected to a subset of the memory
controller. Enabling SNC improves average latency and reduces memory access congestion
