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Dell PowerEdge M630 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 TypeDIMMs Populated Per ChannelVoltage Operating Frequency (in MT/s) Maximum DIMM Rank Per Channel

2400, 2133, 1866

Single rank or dual rank

2400, 2133, 1866




2400, 2133, 1866

Quad rank

2400, 2133, 1866


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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