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Four green DDR5 RDIMM modules without heat spreaders in a matched kit

NEMIX RAM

NEMIX RAM 256GB (4×64GB) DDR5 6400 CL52 2Rx4 ECC Registered RDIMM memory upgrade

SKU CH-6JMG-Z9C1E

A 256 GB kit of four 64 GB DDR5-6400 registered ECC RDIMMs at CL52 and 1.1 V for ASRock Rack GNRD16DNO and GNRD16QM3-NL motherboards

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 4X64GB

Show 4 more
  • 256 GB total capacity from four 64 GB modules
  • DDR5 6400 speed with CL52 latency at 1.10 V
  • Registered ECC design corrects single-bit errors on the fly
  • 2Rx4 dual-rank organisation fully populates every slot
  • Exact fit for ASRock Rack GNRD16DNO and GNRD16QM3-NL motherboards

256GB DDR5-6400 ECC Registered RDIMM Kit

This NEMIX RAM kit provides 256GB of DDR5 memory in four 64GB modules. It operates at 6400MHz (PC5-51200) with CL52 latency and 1.10V voltage. The 288-pin Registered DIMMs feature 2Rx4 organisation and on-die ECC for error correction. It is built for servers requiring registered memory architecture.

Suited for ASRock Rack GNRD16DNO

This kit matches the specific memory population rules and registered DIMM requirement of the listed ASRock Rack boards. It is not for systems that accept only unbuffered UDIMMs or SO-DIMMs. Builders needing consumer desktop memory or laptop modules should look elsewhere. It also does not fit platforms limited to lower maximum capacities per slot.

2Rx4 Registered ECC architecture decides fit

The dual-rank 2Rx4 registered design with ECC is the single specification that determines compatibility. Your motherboard must support registered RDIMMs and this specific rank structure to initialise all four modules at the rated 6400MHz speed. Verify your system manual for approved DIMM population order before purchase.

How it compares

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

Price $7,681.99
Pricier than about 84% 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 $30.01 per GB
Pricier than about 85% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-924K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock Rack
In the box
Included items256 GB 4 × 64 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

How much power does each 64GB DDR5 6400 module draw at its rated 1.10V voltage?

Each module operates at 1.10V, the standard DDR5 voltage, so total kit power scales with the four 2Rx4 registered DIMMs your motherboard populates.

Which motherboard must I already own for this 256GB kit to be recognised at full speed?

The kit is validated for ASRock Rack GNRD16DNO and GNRD16QM3-NL motherboards that accept 288-pin DDR5 RDIMMs at 6400 MT/s.

Will these 2Rx4 registered ECC DIMMs work in a system that currently uses 1Rx8 unbuffered DDR5?

No — registered RDIMMs require a motherboard wired for buffered memory; mixing with unbuffered UDIMMs is not supported.

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