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Two green DDR5 RDIMM sticks in anti-static tray

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR5 4800 ECC RDIMM CL40 1Rx4 memory upgrade

SKU CH-D6FJ-A6HE4

A 64 GB kit of two 32 GB DDR5 4800 ECC registered DIMMs for compatible Supermicro servers

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB total capacity in a 2 x 32 GB kit
  • DDR5 4800 speed rated at PC5-38400
  • ECC registered RDIMM protects data integrity in servers
  • CL40 CAS latency at 1.1 V operating voltage
  • Validated for Supermicro Hyper SuperServer SYS-121H-TNR SYS-221H-TNR SYS-221H-TN24R

64 GB DDR5 ECC RDIMM kit for Supermicro servers

This 64 GB kit contains two 32 GB DDR5 4800 registered DIMMs built with ECC and a 1Rx4 organisation. It is designed for Supermicro Hyper SuperServer models SYS-121H-TNR, SYS-221H-TNR and SYS-221H-TN24R. The modules operate at 1.1 V and carry a CL40 latency rating.

Sustained-load behaviour with ECC registered design

Registered buffering reduces electrical load on the memory controller, allowing stable operation across all populated slots during continuous server workloads. On-die ECC corrects single-bit errors in real time, preventing data corruption during long compute runs. The 1.1 V operating voltage limits heat rise inside dense chassis configurations.

Straightforward 288-pin installation

Each module keys into a standard 288-pin DDR5 RDIMM socket without tools or heat-spreader clearance issues. The main installation risk is populating slots in the wrong sequence for the specific Supermicro motherboard, which can prevent the system from posting or disable ECC functionality. Consult the server manual for the correct population order before seating the DIMMs.

How it compares

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

Price $1,866.99
Pricier than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $29.17 per GB
Pricier than about 83% 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 numberMR38400-314K2
Total capacity64 GB (2 × 32 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 rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items64 GB (2 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How much power does this 1.1 V DDR5 4800 kit draw when the server runs all day?

Each module operates at 1.1 V; total system power depends on the platform and workload, so consult the server documentation for exact figures.

What server platform is required for these 288-pin ECC RDIMMs to function?

The kit is validated for SuperMicro Hyper SuperServer SYS-121H-TNR, SYS-221H-TNR and SYS-221H-TN24R systems.

Can this 1Rx4 registered DDR5 kit share memory channels with existing DDR5 RDIMMs of different rank or speed?

Mixing ranks or speeds on the same channel is not recommended; populate identical modules per channel for stable operation.

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