Supermicro SuperServer SYS-122H-TN User Manual page 170

Current UPI Link Frequency
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Global MMIO Low Base / Limit
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Global MMIO High Base / Limit
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PCIe Configuration Base / Size
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Degrade Precedence
Use this feature to select the degrading precedence option for Ultra Path Interconnect (UPI)
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 Enabled for the system BIOS to enable Link L0p support, which allows the CPU to
reduce the UPI links from full width to half width in the event when the CPU's workload is low in
an attempt to save power. This feature is available for the system that uses Intel processors
with UPI technology support. The options are Disabled, Enabled, and Auto.
Note: You can change the performance settings for non-standard applications by using
this parameter. It is recommended that the default settings be used for standard
applications.
Link L1 Enable
Select Enabled for the BIOS to activate Link L1 support, which will power down the UPI links to
save power when the system is idle. This feature is available for the system that uses Intel
processors with UPI technology support. The options are Disabled, Enabled, and Auto.
Note: Link L1 is an excellent feature for an idle system. L1 is used during Package C-
States when its latency is hidden by other components during a wakeup.
KTI Prefetch
Keizer Technology Interconnect (KTI) is also known as the Intel Ultra Path Interconnect (UPI)
technology. Select Enabled for the KTI prefetcher to preload the L1 cache with data deemed
relevant, which allows the memory read to start earlier on a DDR bus in an effort to reduce
latency. Select Auto for the KTI prefetcher to automatically preload the L1 cache with relevant
data whenever is needed. The options are Disabled, Enabled, and Auto.
SuperServer SYS-122H-TN: UEFI BIOS
170