Technical Guide

Memory subsystem
The PowerEdge R750xs supports up to 16 DIMMs, with up to 1024 GB of memory and speeds of up to 3200MT/s.
The PowerEdge R750xs supports registered (RDIMMs) that use a buffer to reduce memory loading and provide greater density,
allowing for the maximum platform memory capacity.
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 R750xs (DDR4)
DIMM type RDIMM
Transfer speed 3200 MT/s
Voltage 1.2 V (DDR4)
The following table lists the supported DIMMs for the R750xs at launch. For information on memory configuration, see the Dell
EMC PowerEdge R750xs Installation and Service Manual at www.dell.com/poweredgemanuals.
Table 5. Supported DIMMs
Capacity DIMM Type Config DRAM DIMM Max Speed Rated Voltage
8 GB RDIMM 1R x8 8 GB
3200 MT/s
1.2 V
16 GB RDIMM 2R x8 8 GB
3200 MT/s
1.2 V
32 GB RDIMM 2R x8 16 GB
3200 MT/s
1.2 V
64 GB RDIMM 2R x4 16 GB
3200 MT/s
1.2 V
Memory speed
The table below lists the memory configuration and performance details for R750xs 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
5
20 Memory subsystem