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Twelve green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM DDR5 4800 768GB 12x64GB ECC RDIMM CL40 1.1V 2Rx4 memory upgrade

SKU CH-KCJ4-BTJ2M

12 x 64 GB DDR5-4800 ECC registered RDIMM kit delivers 768 GB at CL40 1.1 V for the ASRock Rack GENOA2D24G-2L+ motherboard

  • Total capacity768 GB (12 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 768GB 12X64GB

Show 4 more
  • 768 GB total capacity from twelve 64 GB modules for maximum server density
  • DDR5 4800 speed with CL40 latency delivers rated bandwidth for data-intensive workloads
  • Registered ECC architecture with 2Rx4 organisation enables full-slot population and on-the-fly error correction
  • 1 V operating voltage reduces power draw across fully populated channels
  • Exact-match kit validated for ASRock Rack GENOA2D24G-2L+ motherboard ensuring immediate recognition

Exact-match server upgrade

This 768GB kit delivers twelve 64GB DDR5 4800 RDIMMs built to the ASRock Rack GENOA2D24G-2L+ motherboard's exact specifications. Registered ECC modules with 2Rx4 organisation and 1.1V operation are recognised at full capacity and rated speed without manual tuning.

Capacity and headroom

Twelve slots filled with 64GB DIMMs provide 768GB of addressable memory for multi-socket workloads that scale across all channels. The registered buffer keeps electrical loading low so every slot runs at the rated frequency, while on-die ECC corrects single-bit errors before they reach the application layer.

DDR5 interface limits

The PC5-38400 standard caps transfer rate at 4800 MT/s and CAS latency at CL40, so bandwidth and latency are fixed by the memory controller rather than the modules. Population rules in the motherboard manual determine which slot combinations are valid; unsupported configurations will not train at the rated speed.

How it compares

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

Price $18,673.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (12 × 64 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $24.32 per GB
Pricier than about 69% 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 numberMR38400-924K12
Total capacity768 GB (12 × 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 items768 GB 12 × 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

Will this 12-module 768GB DDR5-4800 kit work if I keep some of my existing DDR5 RDIMMs in the ASRock Rack GENOA2D24G-2L+?

The kit is validated for the ASRock Rack GENOA2D24G-2L+ at DDR5-4800 with 1.1V CL40 2Rx4 registered ECC; mixing different ranks, speeds or voltages can prevent full-capacity recognition, so populate all slots with identical modules per the board's population rules.

How do I verify the kit is running at DDR5-4800 CL40 1.1V with ECC active after installation?

Enter the BIOS or UEFI and confirm the memory reports 4800 MT/s (PC5-38400), CAS latency 40, 1.10 V, registered ECC enabled, and all 768 GB shown across 12 slots.

What exactly ships in the box and is anything else required to install it?

The box contains the 12 x 64 GB DDR5-4800 288-pin ECC registered RDIMM modules (768 GB total); no heat spreaders, cables or tools are included, and the motherboard must support DDR5 RDIMM population.

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