Dell PowerEdge R220 Owner's Manual

System memory

Your system supports DDR3 unbuffered ECC DIMMs. 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 or 1333 MT/s, depending on:

  • maximum frequency of the DIMMs
  • maximum supported DIMM frequency of the processor

Your system has four memory sockets organized into two 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 1 and 3

channel 2: memory sockets 2 and 4

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
  1.35 V 
UDIMM ECC11333, 1600Dual rank
21333, 1600Dual rank

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