Technical Guide

Memory subsystem
The R650xs supports up to 16 DIMMs, with up to 1024 GB of memory and speeds of up to 3200 MT/s.
Topics:
• Supported memory
• Memory speed
Supported memory
The table below lists the memory technologies supported by the platform.
Table 4. Supported memory technologies
Feature PowerEdge R650xs (DDR4)
DIMM type RDIMM
Transfer speed 3200 MT/s
Voltage 1.2 V (DDR4)
The following table lists the supported DIMMs for the R650xs at launch. For information on memory configuration, see the Dell
EMC PowerEdge R650xs Installation and Service Manual at www.dell.com/poweredgemanuals.
Table 5. Supported DIMMs
DIMM Type DIMM
Capacity (GB)
DIMM Speed
(MT/s)
Ranks per
DIMM
Data Width Package Type DIMM Volts
RDIMM 8 GB 3200 1R x8 8 SDP 1.2 V
RDIMM 16 GB 3200 2R x8 8 SDP 1.2 V
RDIMM 32 GB 3200 2R x8 8 SDP 1.2 V
RDIMM 64 GB 3200 2R x4 4 SDP 1.2 V
Memory speed
The table below lists the memory configuration and performance details for the platform based on the quantity and type of
DIMMs per memory channel.
Table 6. DIMM performance details
DIMM type Rank Capacity DIMM rated voltage and speed Operating speed for
DIMMs per Channel
(DPC)
RDIMM 1R 8 GB DDR4 (1.2V), 3200 MT/s
3200 MT/s
2R 16 GB, 32 GB, 64 GB DDR4 (1.2V), 3200 MT/s
3200 MT/s
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Memory subsystem 15