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Dell PowerEdge R730 Owner's Manual

System memory

The system supports DDR4 registered DIMMs (RDIMMs) and load reduced DIMMs (LRDIMMs). System memory holds the instructions that are executed by the processor.

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

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

  • 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

Your 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 tabs of the first socket are marked white, the second socket black, and the third socket green.

Figure 1. Memory socket locations
This figure helps in locating memory sockets.

Memory channels are organized as follows:

Table 1. Memory channelsThis tables describes memory channels and how the channels are organized.
ProcessorChannel 0Channel 1Channel 2Channel 3
Processor 1Slots A1, A5, and A9Slots A2, A6, and A10Slots A3, A7, and A11Slots A4, A8, and A12
Processor 2Slots B1, B5, and B9Slots B2, B6, and B10Slots B3, B7, and B11Slots B4, B8, and B12

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

Table 2. Memory populationThis table describes the memory population and the operating frequencies.
DIMM TypeDIMMs Populated/ChannelVoltageOperating Frequency (in MT/s)Maximum DIMM Rank/Channel
RDIMM11.2 V2400, 2133, 1866Dual rank or single rank
22400, 2133, 1866Dual rank or single rank
31866Dual rank or single rank
LRDIMM11.2 V2400, 2133, 1866Quad rank
22400, 2133, 1866Quad rank
32133, 1866Quad rank

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