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Dell PowerEdge T20 Owner's Manual

PDF

System memory

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

  • CAUTION: Dell recommends you to use ECC DIMMs to minimize the risk of uncorrectable system error, data loss and/or silent data corruption. Non-ECC DIMM is not used for mission-critical applications.
  • NOTE: Non-ECC DIMMs are supported only in selected countries, for more information contact your sales representative.
  • NOTE: MT/s indicates DIMM speed in MegaTransfers per second.
  • NOTE: Non-ECC memory is supported in selected countries only, please contact your sales representative for details
  • CAUTION: Dell recommends that you use ECC memory to minimize the risk of uncorrectable system error, data loss and/or silent data corruption. Non-ECC memory shall be selected for NOT mission-critical usage.
Memory bus operating frequency can be 2133 MT/s, 1600 MT/s and 1333 MT/sdepending on:
  • DIMM type (UDIMM)
  • 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 four memory sockets — two sets of 2-sockets each. Each 2-socket set is organized into one channel. In each socket set, the first socket release lever is marked white and the second socket release lever is marked black.

Figure 1. Memory socket locations on the system board This image shows the location of the memory sockets on the system board.
Figure 2. Memory Socket Locations The figure shows system memory locations.
Figure 3. Memory socket locations on the system board The figure shows system memory locations.
Memory channels are organized as follows:
Processor 1

channel 0: memory sockets A1 and A3

channel 1: memory sockets A2 and A4

The following table shows the memory population 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 21333, 16001333, 1600Dual rank

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