Chapter 4: BIOS
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LLC Dead Line Alloc
Select Enable to opportunistically fill the deadlines in the LLC. The options are Disable,
Enable
, and Auto.
Memory Configuration
STEP DRAM Test
Select Enable for Samsung Test BIOS and Enhanced Post Package Repair (PPR) support.
The options are
Disable
and Enable. If this feature is set to Enable, the following feature
will display:
Operation Mode
Use this feature to set the STEP DRAM test mode. The options are Test Only and
Repair
.
Enforce POR (Plan of Record)
Select POR to enforce POR restrictions for DDR4 memory frequency and voltage
programming. The options are
POR
and Disable.
PPR Type
Post Package Repair (PPR) is a new feature available for the DDR4 Technology. PPR
provides additional spare capacity within a DDR4 DRAM module that is used to replace
faulty cell areas detected during system boot. PPR offers two types of memory repairs.
Soft Post Package Repair (sPPR) provides a quick, temporary fix on a raw element in a
bank group of a DDR4 DRAM device, while hard Post Package Repair (hPPR) will take a
longer time to provide a permanent repair on a raw element. The options are PPR Disabled,
Hard PPR
, and Soft PPR.
Memory Frequency
Use this feature to set the maximum memory frequency for onboard memory modules.
The options are
Auto
, 2133, 2200, 2400, 2600, 2666, 2800, 2933, 3000, and 3200. (
Note
:
Maximum memory frequency is dependent on the CPU SKU.)
Data Scrambling for DDR4
Select Enable to enable data scrambling for DDR4 modules to enhance memory data
security. The options are Disable and
Enable
.
Enable ADR
Select Enable for ADR (Async DIMM Module Self-Refresh) support to enhance memory
performance. The options are Disable and
Enable
.
