20 PowerEdge T320 Technical GuideThe T320 supports the DIMMs listed in Table 9. For the latest information on supported memory,visit Dell.com/PowerEdge.Table 9. DIMMs supportedCapacity(GB)Speed(MT/s) Type Ranks perDIMMDatawidth SDDC support Voltage2 1600 UDIMM 1 x8 Advanced ECC 1.352 1600 RDIMM 1 x8 Advanced ECC 1.354 1600 RDIMM 2 x8 Advanced ECC 1.354 1600 UDIMM 1 x8 Advanced ECC 1.354 1600 UDIMM 2 x8 Advanced ECC 1.354 1600 RDIMM 1 x8 Advanced ECC 1.358 1600 RDIMM 1 x4 All modes 1.358 1600 RDIMM 2 x4 All modes 1.3516 1600 RDIMM 2 x4 All modes 1.3516 1600 RDIMM 2 x4 All modes 1.3532 1333 RDIMM 4 x4 All modes 1.35Memory configurationsFlexible memory configurations are supported on the T320, ranging from capacities of 2GB to192GB. The system supports up to six DIMMs. The T320 has three memory channels per processor,with each channel supporting up to two DIMMs.The T320 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 theslowest DIMM’s common frequency. DIMM type: Only one type of DIMM can be used in a system. UDIMMs and RDIMMs cannot bemixed.The following additional memory population guidelines apply to the T320: Up to two quad-rank (QR), dual-rank (DR), or single-rank (SR) DIMMs may be populated perchannel. DIMMs must be installed in each channel, starting with the DIMM farthest from the processor. DIMMs should be installed from largest rank count to smallest. For example, if DR DIMMS aremixed with SR DIMMs, DR DIMMS should be placed in the lowest DIMM slots, followed by the SRDIMMs.For more information on memory configuration, see theDell PowerEdge T320 Systems Owner’sManual on Dell.com/Support/Manuals.Memory speedThe T320 supports memory speeds of up to 1600MT/s, depending on the DIMM types installed andthe configuration. The loading within a channel significantly affects memory speed.Table 10 illustrates the maximum achievable speed of the Intel Xeon E5-2400 and E5-2400 v2product families based on memory loads. Green boxes are defaults for performance per watt White boxes (with lower voltage) can save power but will run at slower speeds White boxes (with higher voltage) can be custom configured in the bios