Nvdimm Support; Memory Slot Identification And Population Rules; Figure 10. Memory Slots Definition - Penguin Computing Relion 1900e Technical Manual

4.5

NVDIMM Support

Future enhancement
4.6

Memory Slot Identification and Population Rules

Note: Although mixed DIMM configurations may be functional, Intel only supports and performs platform
validation on systems that are configured with identical DIMMs installed.
Each installed processor provides four channels of memory. On the S2600WT each

memory channel supports three memory slots, for a total possible 24 DIMMs installed.
System memory is organized into physical slots on DDR4 memory channels that belong to processor

sockets.
The memory channels from processor socket 1 are identified as Channel A, B, C and D. The memory

channels from processor socket 2 are identified as Channel E, F, G, and H.
Each memory slot on the server board is identified by channel and slot number within that channel.

For example, DIMM_A1 is the first slot on Channel A on processor 1; DIMM_E1 is the first DIMM
socket on Channel E on processor 2.
The memory slots associated with a given processor are unavailable if the corresponding processor

socket is not populated.
A processor may be installed without populating the associated memory slots, provided a second

processor is installed with associated memory. In this case, the memory is shared by the processors.
However, the platform suffers performance degradation and latency due to the remote memory.
Processor sockets are self-contained and autonomous. However, all memory subsystem support

(such as Memory RAS, Error Management,) in the BIOS setup are applied commonly across processor
sockets.
The BLUE memory slots on the server board identify the first memory slot for a given memory

channel.
DIMM population rules require that DIMMs within a channel be populated starting with the BLUE DIMM slot
or DIMM farthest from the processor in a "fill-farthest" approach. In addition, when populating a Quad-rank
DIMM with a Single- or Dual-rank DIMM in the same channel, the Quad-rank DIMM must be populated
farthest from the processor. Intel MRC will check for correct DIMM placement.
Revision 1.0
Relion 1900e/2900e Manual

Figure 10. Memory Slots Definition

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