Chapter 6: BIOS
77
Stale AtoS
This feature optimizes A to S directory. When all snoop responses found in directory A
are found to be RspI, then all data is moved to directory S and is returned in S-state.
The options are
Disable
, Enable, and Auto.
LLC Dead Line Alloc
Select Enable to optimally fill dead lines in LLC. Select Disable to never fill dead lines in
LLC. The options are Disable,
Enable
, and Auto.
Isoc Mode
Isochronous (Isoc) mode allows time-sensitive processes to be given priority. The options
are Disable, Enable, and
Auto
.
Memory Configuration
Enforce POR
Select POR (Plan of Record) to enforce POR restrictions on DDR4 frequency and volt-
age programming. The options are
POR
and Disable.
Memory Frequency
Use this feature to set the maximum memory frequency for onboard memory modules.
The options are
Auto
,
1866, 2000, 2133, 2200, 2400, 2600, and 2666.
Data Scrambling for NVDIMM
Use this feature to enable or disable data scrambling for non-volatile DIMM (NVDIMM)
memory. The options are
Auto
, Disable, and Enable.
Data Scrambling for DDR4
Use this feature to enable or disable data scrambling for DDR4 memory. The options
are
Auto
, Disable, and Enable.
tCCD_L Relaxation
Select Auto to get TCDD settings from SPD (Serial Presence Detect) and implement into
memory RC code to improve system reliability. Select Disable for TCCD to follow Intel
POR. The options are Disable and
Auto
.
Enable ADR
Select Enable for ADR (Automatic Diagnostic Repository) support to enhance memory
performance. The options are
Disable
and Enable
.
