Dell EMC PowerEdge R740xd Technical Specifications

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Memory specifications

Table 1. Memory specificationsThe table below shows the memory specifications for the R740xd system:
Memory module sockets	DIMM type	DIMM rank	DIMM capacity	Single processor		Dual processors
Memory module sockets	DIMM type	DIMM rank	DIMM capacity	Minimum RAM	Maximum RAM	Minimum RAM	Maximum RAM
Twenty four 288-pins	LRDIMM	Octa rank	128 GB	128 GB	1.5 TB	256 GB	3 TB
	LRDIMM	Quad rank	64 GB	64 GB	768 GB	128 GB	1.5 TB
	RDIMM	Single rank	8 GB	8 GB	96 GB	16 GB	192 GB
		Dual rank	16 GB	16 GB	192 GB	32 GB	384 GB
		Dual rank	32 GB	32 GB	384 GB	64 GB	768 GB
		Dual rank	64 GB	64 GB	768 GB	128 GB	1536 GB
	NVDIMM-N	Single rank	16 GB	Not supported with single processor	Not supported with single processor	RDIMM: 192 GB	RDIMM: 384 GB
	NVDIMM-N	Single rank	16 GB	Not supported with single processor	Not supported with single processor	NVDIMM-N: 16 GB	NVDIMM-N: 192 GB
	DCPMM	NA	128 GB	RDIMM: 192GB	RDIMM: 384 GB	RDIMM: 384 GB	LRDIMM: 1536 GB
		NA	128 GB	DCPMM: 128 GB	DCPMM: 128 GB	DCPMM: 1536 GB	DCPMM: 1536 GB
		NA	256 GB	NA	NA	RDIMM: 192 GB	LRDIMM: 1536 GB
		NA	256 GB	NA	NA	DCPMM: 2048 GB	DCPMM: 3072 GB
		NA	512 GB	NA	NA	RDIMM: 384 GB	RDIMM: 1536 GB
		NA	512 GB	NA	NA	DCPMM: 4096 GB	DCPMM: 6144 GB

NOTE: 8 GB RDIMMs and NVDIMM-N must not be mixed.

NOTE: 64 GB LRDIMMs, 128 GB LRDIMMs must not be mixed.

NOTE: Minimum of two CPUs are required for any configurations that support NVDIMM-N.

NOTE: DCPMM can be mixed with RDIMMs and LRDIMMs.

NOTE: Mixing of DDR4 DIMM Types (RDIMM, LRDIMM), within channel, integrated memory controller, socket, or across sockets is not supported.

NOTE: x4 and X8 DDR4 DIMM can be mixed within channel.

NOTE: Mix of Intel Data center persistent memory module operating modes (App Direct, Memory Mode) is not supported within socket or across sockets.

NOTE: Memory DIMM slots are not hot pluggable.