Dell PowerEdge R630 Owner's Manual

Memory

The Dell PowerEdge R630 supports DDR4 registered DIMMs (RDIMMs), and load-reduced DIMMs (LRDIMMs).

NOTE MT/s indicates DIMM speed in MegaTransfers per second.

Memory bus operating frequency can be 1866 MT/s, 2133 or 2400 MT/s depending on:

DIMM type (RDIMM or LRDIMM).
Number of DIMMs populated per channel.
System profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized).
Maximum supported DIMM frequency of the processors.

The system contains 24 memory sockets split into two sets of 12 sockets, one set per processor. Each 12-socket set is organized into four channels. In each channel, the release levers of the first socket are marked white, the second socket black, and the third socket green.

NOTE DIMMs in sockets A1 to A12 are assigned to processor 1 and DIMMs in sockets B1 to B12 are assigned to processor 2.

This figure helps in locating memory sockets.

Memory channels are organized as follows:


Processor 1	Channel 0: slots A1, A5, and A9
	Channel 1: slots A2, A6, and A10
	Channel 2: slots A3, A7, and A11
	Channel 3: slots A4, A8, and A12
Processor 2	Channel 0: slots B1, B5, and B9
	Channel 1: slots B2, B6, and B10
	Channel 2: slots B3, B7, and B11
	Channel 3: slots B4, B8, and B12

The following table shows the memory populations and operating frequencies for the supported configurations.


DIMM Type	DIMMs Populated / Channel	Voltage	Operating Frequency (in MT/s)	Max. DIMM Rank / Channel
RDIMM	1	1.2V	2400, 2133, 1866	Dual Rank or Single Rank
	2		2400, 2133, 1866	Dual Rank or Single Rank
	3		1866	Dual Rank or Single Rank
LRDIMM	1	1.2V	2400, 2133, 1866	Quad Rank
	2		2400, 2133, 1866	Quad Rank
	3		2133, 1866	Quad Rank

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Dell PowerEdge R630 Owner's Manual

Memory

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