Chapter 6: UEFI BIOS
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LLC Dead Line Alloc
Enable, Disable,
and Auto.
Isoc Mode
Select Enable to enable Isochronous support to meet QoS (Quality of Service) requirements.
This feature is especially important for Virtualization Technology. The options are Disable,
Enable, and Auto.
Memory Conguration
Enforce POR
Select POR to enforce POR restrictions for DDR4 memory frequency and voltage
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
Select Enable to enable data scrambling for onboard NVDIMM memory to enhance system
performance and security. The options are Auto, Disable, and Enable.
Data Scrambling for DDR4
Select Enable to enable data scrambling for DDR4 memory to enhance system performance
and security. The options are Auto, Disable, and Enable.
tCCD_L Relaxation
If this feature is enabled, SPD (Serial Presence Detect) will override tCCD_L ("Column to
Column Delay-Long", or “Command to Command Delay-Long” on the column side.) If this
feature is set to Disable, tCCD_L will be enforced based on the memory frequency. The
options are Disable and Auto.
Memory tRWSR (Read to Write turnaround time for Same Rank) Relaxation
Select Enable to use the same tRWSR DDR timing setting among all memory channels, in
which case, the worst case value among all channels will be used. Select Disable to use
options are Disable and Enable.
Enable ADR
Select Enable for ADR (Automatic Diagnostic Repository) support to enhance memory
performance. The options are Enable and Disable.
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