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Dell VxRail E660, E660F, and E660N Installation and Service Manual

System memory guidelines

The VxRail E660 series supports DDR4 registered DIMMs (RDIMMs), Load Reduced DIMM (LRDIMMs) and Intel Persistent Memory 200 series (BPS). System memory holds the instructions that are started by the processor.

Your system memory is organized into eight channels per processor (two memory sockets per channel),16 memory sockets per processor, and 32 memory sockets per system.

Figure 1. Memory channels
The following table describes memory channels and how the channels are organized:
Processor Channel A Channel B Channel C Channel D Channel E Channel F Channel G Channel H
Processor 1 Slots A1 and A9 Slots A5 and A13 Slots A3 and A15 Slots A7 and A15 Slots A2 and A10 Slots A6 and A14 Slots A4 and A12 Slots A8 and A16
Processor 2 Slots B1 and B9 Slots B5 and B13 Slots B3 and B15 Slots B7 and B15 Slots B2 and B10 Slots B6 and B14 Slots B4 and B12 Slots B8 and B16
The following table describes the supported memory matrix:
DIMM type Rank type Capacity DIMM rated voltage and speed Operating Speed
1 DIMM per channel (DPC) 2 DIMMs per channel (DPC)
RDIMM 2 R 16 GB, 32 GB, 64 GB DDR4 (1.2 V), 3200 MT/s 3200 MT/s 3200 MT/s
LRDIMM 4 R 128 GB DDR4 (1.2 V), 3200 MT/s 3200 MT/s 3200 MT/s
8 R 256 GB DDR4 (1.2 V), 3200 MT/s 3200 MT/s 3200 MT/s
Intel Persistent Memory 200 series (BPS) 2 R 128 GB, 256 GB, 512 GB DDR4 (1.2 V), 3200 MT/s 3200 MT/s 3200 MT/s

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