Dell PowerEdge R750 Installation and Service Manual

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System memory guidelines

The PowerEdgeR750system 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.

This image shows memory location PowerEdgeR750 — Figure 1. Memory channels

Memory channels are organized as follows:

Table 1. Memory channelsThe tables 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 A11	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 B11	Slots B7 and B15	Slots B2 and B10	Slots B6 and B14	Slots B4 and B12	Slots B8 and B16

Table 2. Supported memory matrixThe table describes supported memory matrix.
DIMM type	Rank	Capacity	DIMM rated voltage and speed	Operating Speed
DIMM type	Rank	Capacity	DIMM rated voltage and speed	1 DIMM per channel (DPC)	2 DIMMs per channel (DPC)
RDIMM	1 R	8 GB	DDR4 (1.2 V), 3200 MT/s	3200 MT/s	3200 MT/s
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
LRDIMM	8 R	256 GB	DDR4 (1.2 V), 3200 MT/s	3200 MT/s	3200 MT/s
Intel persistent memory (BPS)	2R	128 GB, 256 GB, 512 GB	DDR4 (1.2 V), 3200 MT/s	3200 MT/s	3200 MT/s