Supermicro X13DDW-A User Manual page 112

Super X13DDW-A User's Manual
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Global MMIO High Base / Limit
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PCIe Configuration Base / Size
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 Enable for the system BIOS to enable Link L0p support which will allow 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 Disable, Enable, Auto,
and Full L0p Enable.
Note 1: 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.
Note 2: The option of Full L0p Enable is available when the 5th Gen. Intel Xeon Scal-
able Series process is used.
Link L1 Enable
Select Enable 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 Disable, Enable, 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
Use this feature to configure the Prefetch setting supported by Keizer Technology In-
terconnect (KTI), also known as Intel Ultra Path Interconnect (UPI) Technology. Select
Enable for the KTI prefetcher to preload the L1 cache with data deemed relevant, which
will allow 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 Disable, Enable, and Auto.
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