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

NEMIX RAM

NEMIX RAM DDR5 6400 ECC Registered RDIMM 256GB (2x128GB) CL52 1.1V 2Rx4 288-pin memory upgrade

SKU CH-0NXG-YNAM2

256 GB DDR5 ECC Registered RDIMM kit (2 × 128 GB) at 6400 MT/s, CL52, 1.1 V, 2Rx4, validated for Supermicro H13SRH motherboards

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 256 GB server capacity with two 128 GB DDR5 modules
  • DDR5-6400 speed at PC5-51200 for high-throughput workloads
  • CL52 latency at 1.1 V for efficient registered operation
  • ECC and registered design prevents data corruption under full load
  • Validated for Supermicro H13SRH motherboard with 288-pin RDIMM fit

Exact-match DDR5 ECC RDIMM kit

This NEMIX RAM kit delivers 256 GB as two 128 GB DDR5-6400 Registered ECC modules built to the PC5-51200 standard. It is designed for servers that require registered DIMMs with on-die error correction and the precise 2Rx4 rank layout the memory controller expects.

Thermals noise and power draw

Operating at 1.1 V without heat spreaders, the modules rely on server chassis airflow for cooling and add minimal power load per DIMM. Registered buffering reduces electrical loading on the memory controller, helping keep system power draw predictable when all slots are populated.

2Rx4 registered ECC constraint

The 2Rx4 registered ECC organisation is the single specification that decides compatibility; only motherboards qualified for this exact rank and buffer type will recognise the full 256 GB capacity at the rated 6400 MT/s speed. Buyers whose platforms require unbuffered UDIMMs or a different rank configuration cannot use this kit.

How it compares

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

Price $8,884.99
Pricier than about 86% 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 $34.71 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 systemsSupermicro
In the box
Included items256 GB 2 × 128 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

How do I install these 288-pin DDR5 RDIMMs in my Supermicro H13SRH, and which population rule is most often missed?

Insert each 128 GB module into the slots listed first in the H13SRH manual, pressing until the ejectors click; the step most often missed is following the exact DIMM sequence so the memory controller recognises the full 256 GB at DDR5-6400.

What maintenance or replacement will this 2Rx4 registered ECC kit need over its service life?

No periodic maintenance is required; the modules carry a lifetime replacement warranty, so a single-bit error corrected by ECC or a rare hardware fault is resolved by swapping the affected RDIMM without opening a support ticket.

What limit appears first when the kit runs at 6400 MT/s under sustained load?

The CL52 latency at 1.1 V is the first constraint; registered buffering keeps every slot stable at full capacity, but the timing budget at DDR5-6400 governs maximum sustained throughput before the controller must throttle.

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