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Chapter 3: Maintenance and Component Installation
3.5 Memory
Memory Support
The X12DSC-6 motherboard in each node supports up to 4TB of 3DS LRDIMM/LRDIMM/3DS
RDIMM/RDIMM DDR4 (288-pin) ECC memory with speeds of 3200/2933/2666 MHz in 16
memory slots and up to 4TB of Intel Optane PMem 200 Series with speeds of up to 3200
MHz. (See the notes below.)
Notes:
Intel® Optane™ Persistent Memory (PMem) 200 Series are supported by the
3rd Gen Intel Xeon Scalable Platinum, Gold, and selected Silver processor.
P1-DIMMB2/P2-DIMMB2 memory slots are reserved for Intel Optane PMem 200 Series only.
General Memory Population Requirements
1. Be sure to use the memory modules of the same type and speed on the motherboard.
Mixing of memory modules of different types and speeds is not allowed.
2. Using unbalanced memory topology such as populating two DIMMs in one channel while
populating one DIMM in another channel will result in reduced memory performance.
3. Populating memory slots with a pair of DIMM modules of the same type and size will
result in interleaved memory, which will improve memory performance.
Memory Support for 3rd Gen Intel Xeon Scalable Processors
Type
Ranks Per DIMM &
Data Width
DIMM Capacity (GB)
Speed (MT/s); Voltage (V);
Slots Per Channel (SPC) and DIMMs Per Channel (DPC)
1DPC
(1-DIMM Per Chan-
nel)
2DPC
(2-DIMM Per Channel)
8Gb
16Gb
1.2 V
1.2 V
RDIMM
SRx8
8GB
16GB
3200
3200
SRx4
16GB
32GB
DRx8
16GB
32GB
DRx4
32GB
64GB
RDIMM 3Ds
(4R/8R) X4
2H- 64 GB
4H-128 GB
2H- 128 GB
4H-256 GB
LRDIMM
QRx4
64GB
128GB
3200
3200
LRDIMM - 3Ds
(4R/8R) X4
4H-128 GB
2H- 128 GB
4H-256 GB
3200
3200
