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Chapter 3: Maintenance and Component Installation
Legend (for the two tables above)
Capacity
DCPMM
Any Capacity (Uniformly for all channels for a given configuration)
•
* 2nd socket has no DCPMM DIMM
•
For MM, general nM/FM ratio is between 1:4 and 1:16. excessive capacity for FM can be used for aD. (nM = near
Memory; FM = Far Memory)
•
For each individual population, rearrangements between channels are allowed as long as the resulting population is
compliant with the PDG rules for the 82xx/62xx/52xx/42xx platform.
•
For each individual population, please use the same DDr4 DIMM in all slots.
•
For each individual population, sockets are normally symmetric with exceptions for 1 DCPMM per socket and 1 DCPMM
per node case. Currently, DCPMM modules operate at 2666 MHz.
•
no mixing of DCPMM and nVMDIMMs within the same platform is allowed.
•
This DCPMM population guide targets a balanced DCPMM-to-DraM-cache ratio in MM and MM + aD modes.
Validation Matrix (DDR4 DIMMs Validated w/DCPMM)
DIMM Type
Ranks Per DIMM
& Data Width
(Stack)
DIMM Capacity (GB)
DRAM Density
4Gb
8Gb
rDIMM
1rx4
8GB
16GB
2rx8
8GB
16GB
2rx4
16GB
32GB
lrDIMM
4rx4
n/a
64GB
lrDIMM 3Ds
8rx4 (4H)
n/a
128GB
