Supermicro X11DPT-BR User Manual page 82

Super X11DPT-BR User's Manual
Memory Configuration
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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 Auto, Soft
PPR, Hard PPR, and PPR Disabled.
Memory Frequency
Use this feature to set the maximum memory frequency for onboard memory modules. The
options are Auto, 1866, 2000, 2133, 2400, 2666, and 2933. (Note: Support for 2933 MHz
is dependent on the CPU SKU.)
Data Scrambling for DDR4
Select Enable to enable data scrambling for DDR4 memory to enhance system performance
and security. Select Auto for the default setting of the Memory Reference Code (MRC) to
set configure data scrambling for DDR4 setting. The options are Auto, Disable, and Enable.
tCCD_L Relaxation
If this feature is set to Auto, SPD (Serial Presence Detect) will automatically override
tCCD_L ("Column to Column Delay-Long", or "Command to Command Delay-Long" on the
column side) based on memory frequency. If this feature is set to Disable, tCCD_L will be
enforced based on the memory frequency. The options are Auto, and Disable.
tRWSR (Read to Write turnaround time for Same Rank) Relaxation
Select Enable to use the same tRWSR DDR timing setting among all memory channels,
and as the result, the worst value among all channels will be used. Select Disable to use
different values for the tRWSR DDR timing settings for different channels as trained. The
options are Disable, and Enable.
tRFC (Row Refresh Cycle Time) Optimization for 16Gb Based DIMM
Select Auto to allow the Row Refresh Cycle Timer (tRFC) of the Single Die Package DIMM
to follow the SPD (Serial Presence Detect) setting in order to opimize 16Gb-based DIMM
performance. Select Force 350ns to force tRFC to 350ns. Select Force 550ns to force tRFC
to 550ns. The options are Force 350ns, Force 550ns, and Auto.
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