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Two green DDR5 RDIMM modules without heat spreaders, 288-pin, 256GB kit

NEMIX RAM

NEMIX RAM DDR5 6400 256GB 2Rx4 ECC RDIMM memory upgrade

SKU CH-VYT8-R6JWT

A 256 GB dual-rank DDR5 ECC RDIMM kit running at 6400 MT/s with CL52 latency and 1.1 V for the ASRock Rack GENOA2D16NQM3-2Q motherboard

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

Show 4 more
  • 256 GB total capacity in a 2 x 128 GB kit
  • DDR5 6400 speed with PC5-51200 bandwidth rating
  • CL52 CAS latency at 1.10 V operating voltage
  • 2Rx4 Registered ECC RDIMM for enterprise stability
  • 288-pin form factor verified for ASRock Rack GENOA2D16NQM3-2Q

Exact-match server upgrade

This 256 GB kit contains two 128 GB DDR5-6400 registered ECC RDIMMs built to the precise rank, voltage and timing the motherboard expects. The modules are specified at 1.1 V with CL52 latency and a 2Rx4 organisation so the memory controller recognises full capacity at rated speed. No heat spreaders are fitted. Compatibility is verified for the ASRock Rack GENOA2D16NQM3-2Q motherboard.

Suited for fully populated registered-ECC servers

The registered architecture offloads the memory controller, allowing every slot to run fully populated at full capacity while ECC corrects single-bit errors on the fly. Builders who need unbuffered UDIMMs, SODIMM form factors, non-ECC memory or speeds other than DDR5-6400 should look at other parts. Systems that cannot accept 2Rx4 registered DIMMs at 1.1 V will not support this kit.

DDR5-6400 2Rx4 registered ECC at 1.1 V

The single specification that decides fitment is the combination of DDR5-6400 speed, 2Rx4 registered ECC organisation and 1.1 V operating voltage in a 288-pin RDIMM. If the motherboard requires a different rank configuration, voltage or form factor, the modules will not be recognised or will not run at the rated data rate. Always confirm the board's qualified-vendor list and population rules before purchase.

How it compares

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

Price $8,170.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $31.92 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 numberMR51200-724K2
Total capacity256 GB (2 × 128 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 2 × 128 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 do I install the 288-pin RDIMM modules in the ASRock Rack GENOA2D16NQM3-2Q and what step is often missed?

Power down, open the chassis, and insert each 128GB module into the slots specified by the motherboard manual; the step most people miss is following the exact population order so the 2Rx4 registered DIMMs initialise at the full 256GB capacity.

What maintenance or replacement will the 256GB DDR5 6400 ECC RDIMM kit need later?

No scheduled maintenance is required; if a module ever fails the lifetime replacement warranty covers it, and ECC continues correcting single-bit errors on the fly throughout the server's service life.

What limit appears first when the 2Rx4 registered ECC memory runs sustained workloads at 1.1V?

The thermal limit of the bare DRAM packages — there is no heat spreader, so prolonged heavy traffic can raise chip temperature until the memory controller throttles speed to protect data integrity.

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