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Two green DDR5 RDIMM sticks, no heat spreaders, 288 pins each

NEMIX RAM

NEMIX RAM DDR5 6400 CL52 128GB (2x64GB) ECC Registered RDIMM 2Rx4 1.1V ASRock Rack GNR2D16-2T memory upgrade

SKU CH-W4QQ-WJYZ7

128GB DDR5-6400 ECC Registered RDIMM kit (2×64GB, CL52, 1.1V, 2Rx4) validated for the ASRock Rack GNR2D16-2T motherboard

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB 2X64GB

Show 4 more
  • Exact-match 128 GB DDR5-6400 kit runs at rated speed
  • Registered 2Rx4 ECC RDIMM offloads controller for full-population stability
  • ECC corrects single-bit errors preventing silent data corruption
  • Verified fit for ASRock Rack GNR2D16-2T motherboard memory rules
  • Lifetime replacement warranty with US-based technical support

Exact-match server upgrade

This NEMIX RAM kit delivers 128GB of DDR5 memory in a two-module configuration built for the ASRock Rack GNR2D16-2T motherboard. Each 64GB module is a 288-pin registered DIMM with ECC and a 2Rx4 organisation. The kit operates at 6400 MT/s with CL52 latency at 1.1V, matching the board's qualified specifications exactly.

Sustained-load stability

Registered architecture buffers the address and command signals so the memory controller remains stable when all slots are populated at full capacity. ECC detects and corrects single-bit errors in real time, preventing silent data corruption during long-running workloads. The 1.1V operating voltage keeps power draw consistent under continuous server duty cycles.

When the jump is worth it

This kit replaces smaller-capacity or slower DDR5 RDIMMs when the platform requires the full 128GB at 6400 MT/s with registered ECC. It is not for systems that accept only unbuffered UDIMMs, SODIMM form factors, or lower-density modules. Builders needing a different capacity, rank structure, or voltage should verify the motherboard's qualified-vendor list before purchasing.

How it compares

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

Price $4,589.99
Pricier than about 79% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $35.86 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 numberMR51200-924K2
Total capacity128 GB (2 × 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 items128 GB 2 × 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 64 GB DDR5 6400 RDIMM draw at the rated 1.1 V?

Each module operates at 1.10 V; total kit capacity is 128 GB across two 64 GB RDIMMs, so power scales with the number of populated slots.

What motherboard and memory slots are required to install this 288-pin DDR5 RDIMM kit?

The kit is verified for the ASRock Rack GNR2D16-2T motherboard and requires DDR5 RDIMM slots; it will not fit UDIMM or SODIMM sockets.

Will the registered ECC design let me fill every DDR5 slot on the ASRock Rack board without downclocking?

Yes, the 2Rx4 registered architecture offloads the memory controller so all slots can run at the rated 6400 MT/s with ECC active.

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