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B.1
DDR4 DIMM Population Rules
The following memory population rules apply when installing DIMMs:
•
DDR4 DIMMs can only be installed in blue slots.
•
Mixed DDR4 DIMM rules:
o Mixing DDR4 DIMMs of different speeds and latencies is not supported within or across
processors. If a mixed configuration is encountered, the BIOS attempts to operate at the highest
common speed and the lowest latency possible.
o x4 and x8 DDR4 DIMMs may be mixed in the same channel.
o Mixing of DDR4 DIMM types (RDIMM, LRDIMM, 3DS-RDIMM, 3DS-LRDIMM) within or across
processors is not supported. This is a Fatal Error Halt in Memory Initialization.
•
If channels A, C, E, and G are populated, they must be populated with same total DDR4 DIMM capacity
per channel.
•
If channels B, F, D, and H are populated, they must be populated with same total DDR4 DIMM capacity
per channel
•
Memory slots associated with a given processor are unavailable if the corresponding processor
socket is not populated.
•
Processor sockets are self-contained and autonomous. However, all memory subsystem support
(such as memory RAS and error management) in the BIOS Setup are applied commonly for each
installed processor.
•
For best system performance, memory must be installed in all eight channels for each installed
processor.
•
For best system performance in dual processor configurations, installed DDR4 DIMM type and
population for DDR4 DIMMs configured to CPU 1 must match DDR4 DIMM type and population
configured to CPU 0.
B.2
Intel® Optane™ Persistent Memory 200 Series Module Rules
(Intel® Server Board D50TNP1SB Only)
All operating modes:
•
Only Intel® Optane™ PMem modules are supported.
•
In an Intel server system, support for Intel® Optane™ persistent memory 200 series module is only
available on air-cooled systems.
•
Intel® Optane™ persistent memory 200 series modules are only supported in DIMM slot 2 (black slot)
and the slot 1 (blue slot) in the same memory channel must be populated with one DDR4 DIMM.
•
Mixing of different DDR4 DIMM types on the system is not supported nor validated. Intel® Optane™
persistent memory 200 series and DDR4 must have the same capacity and type across or within all
sockets.
Memory mode:
•
Populate each memory channel with at least one DDR4 to maximize bandwidth.
•
Intel® Optane™ persistent memory 200 series modules must be populated symmetrically for each
installed processor (corresponding slots populated on either side of each processor) and across both
processors.
App Direct mode:
•
Minimum of one Intel® Optane™ persistent memory 200 series module for the board.
Intel® Server D50TNP Family Integration and Service Guide
Appendix B. Memory Population Rules
197
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