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

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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 TypeDIMMs Populated Per ChannelVoltage Operating Frequency (in MT/s) Maximum DIMM Rank Per Channel
RDIMM11.2 V

2400, 2133, 1866

Single rank or dual rank
2

2400, 2133, 1866

3

1866

LRDIMM11.2 V

2400, 2133, 1866

Quad rank
2

2400, 2133, 1866

3

2133, 1866

Figure 1. Memory socket locations
This figure shows system memory 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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