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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR5 4800 CL40 ECC RDIMM Server memory upgrade

SKU CH-XFMJ-5T1QR

256GB kit of four 64GB DDR5 4800 CL40 ECC registered DIMMs for Supermicro 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 across four 64 GB modules
  • DDR5 4800 MT/s speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM design protects data integrity
  • 10 V operating voltage reduces power draw
  • Validated for Supermicro SuperServer SSG-521E-E1CR24H and SSG-521E-E1CR24L

Server Memory Kit for Supermicro Systems

This NEMIX RAM kit supplies 256GB of DDR5 ECC registered memory in a matched set of four 64GB modules. It is built for Supermicro Storage SuperServer SSG-521E-E1CR24H, SSG-521E-E1CR24L and X13SEDW-F platforms that require registered DIMMs with error correction.

Administrators Needing Verified Compatibility

Suits IT teams who must guarantee stability in mission-critical Supermicro servers and want modules stress-tested under load. Not for builders using consumer motherboards that accept only unbuffered non-ECC DIMMs, or for anyone needing a different capacity or speed than this kit provides.

4800 MT/s Registered ECC at CL40

The kit runs at DDR5 4800 (PC5-38400) with a CAS latency of CL40 and 1.10V across 288-pin 2Rx4 registered modules. This speed and latency combination determines whether the memory matches the server's qualified vendor list and timing requirements.

How it compares

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

Price $6,232.99
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 $24.35 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 lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro 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 systemsSupermicro
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

Does my SuperMicro SSG-521E-E1CR24H server have the registered DDR5 slots this 4800 CL40 kit requires?

The kit is built for SuperMicro Storage SuperServer SSG-521E-E1CR24H and SSG-521E-E1CR24L systems using 288-pin DDR5 RDIMM slots at 1.1 V.

Can I keep my existing DDR5 4800 CL40 modules and add this 256 GB kit alongside them?

All four 64 GB modules are 2Rx4 registered ECC at 4800 MT/s CL40 1.1 V; matching rank, speed, voltage and ECC type lets them run together in the same channel.

How do I confirm the full 256 GB is recognised and ECC is active after installation?

Check the BIOS memory summary for 256 GB total, 4800 MT/s speed, CL40 timings and ECC enabled status.

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