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Sixteen green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 256GB (16x16GB) DDR5 4800 CL40 ECC RDIMM SuperMicro Server memory upgrade

SKU CH-NVJA-ZWWDY

A 256GB DDR5 4800 CL40 ECC registered memory kit with sixteen 16GB modules for SuperMicro servers

  • 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 across 16 modules for dense server workloads
  • DDR5 4800 speed with PC5-38400 bandwidth for high-throughput tasks
  • ECC registered RDIMM design ensures data integrity in mission-critical systems
  • 1 V operation reduces power draw per module
  • Validated for SuperMicro SYS-111C-NR and SYS-521C-NR platforms

256GB DDR5 ECC RDIMM kit

This NEMIX RAM kit provides 256GB of DDR5 4800 registered ECC memory across sixteen 16GB modules. It is built for Supermicro UP SuperServer SYS-111C-NR and SYS-521C-NR systems using the X13SEDW-F motherboard. The modules run at 1.10V with CL40 latency and use a 1Rx8 organisation.

Suited for Supermicro DDR5 servers

This kit fits administrators expanding compatible Supermicro platforms that require registered ECC DDR5 RDIMMs. It is not for desktop motherboards, laptops or any system that accepts only unbuffered non-ECC memory or earlier DDR generations. Buyers needing lower capacities or different speeds should look elsewhere.

16x16GB registered DDR5 configuration

The sixteen-module 1Rx8 layout delivers the full 256GB in a single qualified kit for the listed Supermicro servers. Population rules for the X13SEDW-F board determine whether all slots can be filled at the rated 4800MT/s. Verify the motherboard memory guide before purchase.

How it compares

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

Price $7,431.99
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 $29.03 per GB
Pricier than about 82% 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 numberMR38400-618K16
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 systemsSupermicro
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

Will these 16x16GB DDR5 4800 CL40 RDIMMs fit the DIMM slots on my SuperMicro X13SEDW-F motherboard?

Yes, the kit uses 288-pin DDR5 RDIMM form factor which matches the X13SEDW-F slots; the 16 modules populate every channel for the full 256 GB capacity.

Can I add this 1Rx8 registered kit alongside existing DDR5 RDIMMs of a different rank or speed in the same server?

The modules are 1Rx8 registered at 4800 MT/s CL40; mixing different ranks or speeds is not recommended because the memory controller will down-clock all DIMMs to the slowest common settings.

How can I verify the kit is running at the rated 4800 MT/s with ECC active after installation?

Check the BIOS memory information screen or run a tool such as dmidecode; it should report 4800 MT/s, CL40 timings, 1.10 V, and ECC type as registered for each of the 16 DIMMs.

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