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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

  • Capacity256GB (2 x 128GB)
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 6400 (PC5 51200)
  • CAS LatencyCL52
  • Voltage1.10V
  • ECCYes

Size 256GB 2X128GB

Show 4 more configurations
  • 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.

Highlights

  • 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

Specifications

BrandNEMIX RAM
SeriesNEMIX RAM Original Series Server Memory
ModelDDR5 ECC RDIMM Registered Server Memory
Part NumberMR51200-724K2
Capacity256GB (2 x 128GB)
Type288-Pin DDR5 RDIMM
SpeedDDR5 6400 (PC5 51200)
CAS LatencyCL52
Voltage1.10V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
ChipsetMajor OEM Samsung, Micron, Hynix
Heat SpreaderNo
Compatible SystemASRock Rack
FeaturesDDR5 ECC RDIMM Motherboard Compatible
Package Content256GB 2X128GB DDR5 6400MHz PC5-51200 2Rx4 1.1V 288-PIN ECC RDIMM KIT

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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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