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Eight green DDR5 RDIMM modules with black chips, no heat spreaders, 288 pins each

NEMIX RAM

NEMIX RAM 512GB 8x64GB DDR5 4800 ECC RDIMM 2Rx4 CL40 1.1V 288-pin memory upgrade

SKU CH-9F68-728MS

Eight 64 GB DDR5 registered ECC modules deliver 512 GB at 4800 MT/s with CL40 timing and 1.1 V operation for the ASRock Rack SIENAD10HM3 motherboard

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 512GB 8X64GB

Show 3 more
  • 512 GB total capacity for memory-intensive workloads with eight 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 for high-throughput server tasks
  • Registered ECC design with 2Rx4 rank corrects single-bit errors and stabilises full-slot population
  • CL40 latency at 1.1 V operation matches the motherboard's timing and voltage requirements
  • Verified fit for ASRock Rack SIENAD10HM3 using 288-pin RDIMM form factor

Exact-match 512 GB DDR5 ECC RDIMM kit

This 512 GB kit contains eight 64 GB DDR5-4800 registered ECC RDIMMs built to the exact rank, voltage and timing the ASRock Rack SIENAD10HM3 motherboard expects. It is intended for server administrators who need the full supported capacity recognised at rated speed without manual tuning.

Replaces mismatched or partial population

The 2Rx4 registered architecture offloads the memory controller so every slot can run fully populated at 4800 MT/s, while on-die ECC corrects single-bit errors before they reach production workloads. The jump is worth it when a server currently runs with fewer DIMMs, mixed ranks or unbuffered modules that limit capacity or stability.

Handles maximum qualified density per channel

Eight 64 GB modules fill the board's validated population rules at 1.1 V and CL40, delivering the highest qualified density per channel for virtualisation, database or compute clusters. It runs out when the platform's memory-controller limit or licensing tier caps usable capacity below the installed 512 GB.

How it compares

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

Price $13,813.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $26.98 per GB
Pricier than about 75% 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 numberMR38400-924K8
Total capacity512 GB (8 × 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 items512 GB 8 × 64 GB DDR5 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Does the 288-pin DDR5 RDIMM form factor fit the ASRock Rack SIENAD10HM3 motherboard slots?

Yes, the kit uses 288-pin DDR5 RDIMM modules, which is the exact form factor required by the ASRock Rack SIENAD10HM3 motherboard.

What is the correct installation sequence for the eight 64 GB modules on this board?

Install all eight 64 GB modules following the motherboard manual's DIMM population order to ensure full 512 GB capacity is recognised at DDR5 4800 speed.

Will the registered ECC design require any firmware updates or ongoing maintenance?

No firmware updates are needed for the memory itself; ECC correction runs automatically, and the modules have no heat spreaders or moving parts to service.

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