Supermicro X13SEED-F User Manual page 75

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: Linked 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
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.
IO Directory Cache (IODC)
Select Enable for the IODC 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. Enable this feature to improve average latency and reduce memory access
congestion for higher performance. The options are AUTO, Disable, Enable SNC2
(2-clusters), and Enable SNC4 (4-clusters).
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Chapter 4: UEFI BIOS