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Sixteen green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 256GB 16x16GB DDR5 4800 CL40 ECC RDIMM Dell XE9640

SKU CH-YBKT-QJVJD

256 GB server memory kit with sixteen 16 GB DDR5 4800 CL40 ECC registered DIMMs for Dell PowerEdge XE9640

  • Total capacity256 GB (16 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity from 16 matched 16 GB modules
  • DDR5 4800 speed with PC5-38400 bandwidth for server workloads
  • ECC registered RDIMM design protects data integrity in critical systems
  • CL40 latency at 1.1 V balances responsiveness and power efficiency
  • 288-pin 1Rx8 configuration validated for Dell PowerEdge XE9640 compatibility

256 GB DDR5 4800 ECC RDIMM kit for Dell PowerEdge

This sixteen-module kit delivers 256 GB of DDR5 4800 registered ECC memory for the Dell PowerEdge XE9640 rack server. Each 16 GB module operates at 1.1 V with CL40 latency and a 1Rx8 organisation. The 288-pin RDIMM form factor fits the server's registered DIMM slots. Modules use major OEM Samsung, Micron or Hynix chips.

Server administrators expanding XE9640 capacity

The kit suits IT teams scaling memory in Dell PowerEdge XE9640 servers for virtualisation, database or HPC workloads that demand registered ECC reliability. Buyers needing unbuffered UDIMM modules for workstations or consumer motherboards cannot use this registered kit. Systems limited to lower DDR5 speeds or different pin counts are also incompatible.

Registered ECC RDIMM requirement

The single specification that decides fit is the registered ECC RDIMM interface; the XE9640 memory controller only accepts registered modules with error-correcting code. Unbuffered or non-ECC DDR5 DIMMs will not function in this platform.

How it compares

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

Price $6,940.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (16 × 16 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $27.11 per GB
Pricier than about 75% 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 numberMR38400-618K16
Total capacity256 GB (16 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsDell
In the box
Included items256 GB (16 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Does the Dell PowerEdge XE9640 need a specific BIOS revision before the 16 modules can be recognised?

The kit is built to Dell XE9640 specifications; follow the server manual for any required firmware update before installing the 16 modules.

Will the 1.1 V CL40 registered ECC modules run alongside any existing RDIMMs already installed in the server?

Mixing ranks or speeds is not recommended; for stable operation populate all slots with identical 1Rx8 4800 modules from this kit.

How can I confirm the full 256 GB is running at 4800 MT/s with ECC active after installation?

Check the system BIOS or iDRAC memory inventory — it should show 16 × 16 GB, 4800 MT/s, ECC enabled, registered.

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