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Four green DDR5 RDIMM sticks without heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR5 4800 CL40 ECC RDIMM Dell PowerEdge XE8640 memory upgrade

SKU CH-9T7F-NC2E3

256 GB kit of four 64 GB DDR5 4800 CL40 ECC registered DIMMs validated for Dell PowerEdge XE8640 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 speed with CL40 latency for responsive data access
  • ECC registered design detects and corrects memory errors
  • 1 V operation reduces power draw in dense server configs
  • Validated for Dell PowerEdge XE8640 rack server compatibility

Dell PowerEdge XE8640 memory kit

This 256 GB kit contains four 64 GB DDR5 modules built for the Dell PowerEdge XE8640 rack server. Each module is a registered ECC RDIMM rated at 4800 MT/s with CL40 latency. The kit targets IT teams expanding memory capacity in compatible Dell enterprise platforms.

288-pin registered DIMM format

Modules use the standard 288-pin DDR5 RDIMM layout and operate at 1.1 V without a heat spreader. The registered buffer and ECC circuitry help maintain data integrity under sustained server workloads. Chip sources include major OEM suppliers such as Samsung, Micron and Hynix.

Low-voltage DDR5 operation

Running at 1.1 V reduces power draw compared with previous DDR generations while delivering 4800 MT/s throughput. The absence of a heat spreader relies on chassis airflow for cooling, so adequate server ventilation is required. Registered buffering adds minimal latency overhead for stable operation.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $6,380.99
Pricier than about 82% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $24.93 per GB
Pricier than about 69% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineDell Server/Workstation Compatible Series Memory
Model nameDell DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsDell
In the box
Included items256 GB (4 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What DDR5 speed and CAS latency does this 256 GB kit run at?

The kit operates at DDR5 4800 with a CL40 latency, delivering PC5-38400 bandwidth.

Will these 288-pin RDIMMs fit the Dell PowerEdge XE8640 memory slots?

Yes, the 288-pin DDR5 RDIMM form factor matches the XE8640 DIMM sockets exactly.

How do I install the four 64 GB modules in the correct population order?

Follow the XE8640 service manual to populate the channels in the prescribed sequence; the common mistake is skipping a channel and leaving bandwidth unused.

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