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Dell PowerEdge R320 Systems Owner's Manual

System Memory

Your system supports DDR3 unbuffered ECC DIMMs (ECC UDIMMs) and registered DIMMs (RDIMMs). It supports DDR3 and DDR3L voltage specifications.

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

Memory bus operating frequency can be 1600 MT/s, 1333 MT/s, 1066 MT/s, or 800 MT/s depending on:

  • DIMM type (UDIMM or RDIMM)
  • DIMM configuration (number of ranks)
  • maximum frequency of the DIMMs
  • number of DIMMs populated per channel
  • DIMM operating voltage
  • system profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized)
  • maximum supported DIMM frequency of the processor

The system contains six memory sockets organized into three channels. In each channel, the release levers of the first socket are marked white and the second socket black.

Figure 1. Memory Socket Locations The figure shows system memory locations.

Memory channels are organized as follows:

channel 1: memory sockets A1 and A4

channel 2: memory sockets A2 and A5

channel 3: memory sockets A3 and A6

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

DIMM TypeDIMMs Populated/ChannelOperating Frequency (in MT/s)Maximum DIMM Rank/Channel
  1.5 V1.35 V 
UDIMM ECC11333, 1066, and 8001333, 1066 and 800Dual rank
21333, 1066, and 8001066 and 800Dual rank

1600, 1333, 1066 and 800

1333, 1066, and 800

1333, 1066 and 800

1066 and 800

Dual rank

Quad rank


1600, 1333, 1066, and 800

1066 and 800

1333, 1066, and 800

1066 and 800

Dual rank

Quad rank

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