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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM DDR5 ECC RDIMM 256GB (4×64GB) 6400MHz CL52 1.1V 2Rx4 Registered Server Memory Upgrade

SKU CH-M6ND-NC2QR

A 256 GB DDR5 ECC registered server memory kit of four 64 GB modules running at 6400 MHz CL52 and 1.1 V, validated for the ASRock Rack GNR2D16-2T motherboard

  • 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
  • 256GB kit fills every slot at rated speed
  • 6400MHz DDR5 with CL52 latency delivers responsive throughput
  • Registered ECC design corrects single-bit errors automatically
  • 1V operation keeps power draw low under load
  • 288-pin RDIMM form factor matches ASRock Rack board exactly

Exact-match upgrade kit

This NEMIX RAM DDR5 ECC RDIMM kit delivers 256GB across four 64GB modules running at 6400MHz with CL52 latency and 1.1V operation. Registered architecture and ECC support provide the stability required for server workloads on the ASRock Rack GNR2D16-2T motherboard.

Replaces mixed or smaller kits

A single validated kit eliminates the risk of mixing modules with different ranks, voltages or timings that can prevent full-capacity recognition. The upgrade is worth it when your board demands 2Rx4 registered DIMMs at this exact speed and your current memory falls short of the required population rules.

Suits ASRock Rack GNR2D16-2T builders

This kit fits administrators who need the precise 288-pin registered ECC configuration specified for their motherboard. Buyers who want unbuffered UDIMMs, SODIMMs, non-ECC modules or a different capacity per DIMM should look at something else.

How it compares

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

Price $8,924.99
Pricier than about 86% 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 $34.86 per GB
Pricier than about 90% 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

Will the 288-pin DDR5 RDIMM modules fit the ASRock Rack GNR2D16-2T motherboard slots?

Yes, the 288-pin Registered DDR5 form factor matches the board's DIMM slots exactly; the kit is verified for the ASRock Rack GNR2D16-2T motherboard.

What is the correct population order when installing all four 64 GB modules on the ASRock Rack GNR2D16-2T?

Follow the motherboard manual's approved DIMM population sequence for full 256 GB capacity; the kit's 2Rx4 registered design supports every slot running fully populated at DDR5-6400.

Do these ECC RDIMMs require any periodic maintenance or firmware updates during their service life?

No scheduled maintenance is needed; the modules are backed by a lifetime replacement warranty and free US-based technical support for any future issues.

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