Dell PowerEdge M630 Systems (VRTX Enclosure) Owner's Manual

System memory

Your system supports DDR4 registered DIMMs (RDIMMs) and load reduced DIMMs (LRDIMMs). It supports DDR4 voltage specifications.

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

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

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.

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

Table 1. Memory population — operating frequency for supported configuration1 or 2 dual- or single-rank RDIMMs populated per channel operate at 2400, 2133, 1866 frequencies. 3 dual- or single-rank RDIMMs populated per channel operate at 1866 frequency. 1 or 2 quad-rank LRDIMMs populated per channel operate at 2400, 2133, 1866, frequencies. 3 quad-rank LRDIMMs populated per channel operate at 2133, 1866 frequencies.
DIMM Type	DIMMs Populated Per Channel	Voltage	Operating Frequency (in MT/s)	Maximum DIMM Rank Per Channel
RDIMM	1	1.2 V	2400, 2133, 1866	Single rank or dual rank
	2		2400, 2133, 1866
	3		1866
LRDIMM	1	1.2 V	2400, 2133, 1866	Quad rank
	2		2400, 2133, 1866
	3		2133, 1866

This figure shows system memory locations. — Figure 1. Memory socket locations

Memory channels are organized as follows:

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

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Dell PowerEdge M630 Systems (VRTX Enclosure) Owner's Manual

System memory

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