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Two green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM DDR5 6400 128GB (2x64GB) ECC RDIMM CL52 1.1V 2Rx4 ASRock Rack GNRAPD12DNO

SKU CH-9JFP-VW0R6

A 128GB kit of two 64GB DDR5 6400 registered ECC RDIMMs built for the ASRock Rack GNRAPD12DNO server 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 DDR5-6400 match runs at rated speed on ASRock Rack GNRAPD12DNO
  • 128 GB (2×64 GB) fills both channels for maximum throughput
  • Registered ECC corrects single-bit errors to prevent data corruption
  • 1 V operation reduces power draw in dense server configs
  • 2Rx4 dual-rank layout enables full-capacity population per slot

Exact-Match Server Upgrade

This NEMIX RAM kit delivers 128GB across two 64GB DDR5 RDIMMs rated at 6400 MT/s with CL52 latency at 1.1V. The 2Rx4 registered ECC modules are built to the precise rank, voltage and timing the ASRock Rack GNRAPD12DNO expects so the memory controller recognises full capacity at rated speed.

Sustained Load Stability

Registered buffering offloads the memory controller allowing every slot to remain fully populated at full capacity without signal degradation. On-die ECC corrects single-bit errors in real time preventing silent data corruption and unplanned reboots during continuous production workloads.

2Rx4 Rank Configuration

The dual-rank by four architecture is the single specification that determines whether this kit matches your board's population rules and memory-controller expectations. Verify your system manual for supported capacities and approved DIMM order before purchase.

How it compares

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

Price $4,209.99
Pricier than about 77% 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 $32.89 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

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Questions about this item

How much power does this 128GB DDR5 6400 ECC RDIMM kit draw when the server runs continuously?

Each module operates at 1.10V. The registered design reduces electrical load on the memory controller, helping keep system power draw stable during all-day operation.

What motherboard slot and memory type must my system already provide for this 2Rx4 registered kit to function?

The board needs 288-pin DDR5 RDIMM slots that support registered ECC memory and the PC5-51200 speed grade; UDIMM or SODIMM slots will not accept these modules.

Can I populate all memory channels on my ASRock Rack GNRAPD12DNO with this 6400MHz CL52 kit without down-clocking?

The kit is spec-matched to the GNRAPD12DNO's DDR5-6400 registered ECC requirements, so fully populated channels run at the rated 6400MHz CL52 without automatic speed reduction.

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