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

NEMIX RAM

NEMIX RAM 256GB 4x64GB DDR5 4800 CL40 2Rx4 ECC RDIMM ASRock SIENAD10HM3

SKU CH-B9QV-RJ4GS

256 GB kit of four 64 GB DDR5-4800 CL40 2Rx4 ECC registered RDIMMs at 1.1 V for ASRock Rack SIENAD10HM3

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 4X64GB

Show 3 more
  • 256 GB total capacity from four 64 GB modules for maximum server density
  • DDR5 4800 speed with CL40 latency runs at rated performance on the ASRock Rack SIENAD10HM3
  • Registered ECC RDIMM architecture offloads the memory controller and corrects single-bit errors automatically
  • 1 V operation matches the board's voltage requirement for stable full-population operation
  • 288-pin 2Rx4 form factor fits the motherboard's memory-population rules exactly

256 GB DDR5 ECC RDIMM Kit

This NEMIX RAM kit supplies 256 GB of DDR5 ECC Registered memory in four 64 GB modules. It is built for servers that require the registered DIMM form factor and error-correcting code to maintain data integrity under continuous load. The modules run at 4800 MHz with CL40 timing at 1.1 V.

Suited for ASRock Rack SIENAD10HM3 owners

This kit matches the memory population rules of the ASRock Rack SIENAD10HM3 motherboard, so every slot can be filled at the rated speed. Builders who need unbuffered UDIMMs, SODIMMs, or a different voltage should look elsewhere because those form factors will not fit or function on this board.

Registered ECC with 2Rx4 organization

The 2Rx4 registered ECC design is the single specification that determines compatibility; the memory controller expects this exact rank structure and buffering to initialize at full capacity. If your system requires a different rank layout or unbuffered modules, this kit will not be recognized.

How it compares

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

Price $6,066.99
Pricier than about 82% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $23.70 per GB
Pricier than about 68% 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 numberMR38400-924K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock Rack
In the box
Included items256 GB 4 × 64 GB DDR5 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

Does the kit ship with all four 64 GB modules or must any be purchased separately?

The package contains the complete 256 GB kit as four matched 64 GB DDR5 4800 CL40 ECC RDIMM modules; nothing extra is required for a full installation.

When would I choose this 256 GB 4×64 GB DDR5 4800 CL40 kit over a smaller capacity?

Select this kit when the ASRock Rack SIENAD10HM3 board needs maximum registered ECC capacity across four slots, with 2Rx4 organisation and 1.1 V operation already validated.

What does the DDR5 4800 CL40 rating mean once the modules are installed in the server?

The memory runs at 4800 MT/s with a CAS latency of 40 cycles, delivering PC5-38400 bandwidth while registered ECC operation maintains data integrity at full population.

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