18 PowerEdge R320 Technical Guide
The R320 supports the DIMMs listed in Table 8. For the latest information on supported memory,
visit Dell.com/PowerEdge.
Table 8. DIMMs supported
Memory configurations
Flexible memory configurations are supported on the R320, ranging from capacities of 2GB to
192GB. The system supports up to six DIMMs per processor. The R320 has three memory channels
per processor, with each channel supporting up to two DIMMs.
The R320 supports a flexible memory configuration according to these basic rules:
Speed: If DIMMs of different speeds are mixed, all channels across all processors operate at the
slowest DIMM’s common frequency.
DIMM type: Only one type of DIMM can be used in a system. UDIMMs and RDIMMs cannot be
mixed.
The following additional memory population guidelines apply to the R320:
Up to two quad-rank (QR), dual-rank (DR), or single-rank (SR) DIMMs may be populated per
channel.
DIMMs must be installed in each channel, starting with the DIMM farthest from the processor.
DIMMs should be installed with largest rank count to smallest. For example, if DR DIMMS are
mixed with SR DIMMs, DR DIMMS should be placed in the lowest DIMM slots, followed by the SR
DIMMs.
For more information on memory configuration, see the
Dell PowerEdge R320 Systems Owner’s
Manual
on Dell.com/Support/Manuals.
Memory speed
The R320 supports memory speeds of up to 1600MT/s, depending on the DIMM types installed and
the configuration. The loading within a channel significantly affects memory speed.
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