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Two green DDR5 RDIMM modules with gold contacts and black chips no heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR5 4800 ECC RDIMM CL40 1Rx4 1.1V ASRock IMB-1900/1902 memory upgrade

SKU CH-4FQ4-EX3Y6

64GB DDR5 4800 ECC RDIMM kit (2×32GB, CL40, 1.1V) for ASRock IMB-1900 and IMB-1902 motherboards

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64GB kit doubles memory capacity for demanding workloads
  • DDR5 4800 speed delivers high bandwidth for server applications
  • ECC registered design protects data integrity in critical systems
  • 1V operation reduces power draw compared to higher-voltage modules
  • Validated for ASRock IMB-1900 and IMB-1902 industrial motherboards

ASRock IMB-1900/1902 memory upgrade

This 64 GB kit supplies two 32 GB DDR5 4800 ECC RDIMM modules built for ASRock Industrial IMB-1900 and IMB-1902 motherboards. Registered buffering and on-die ECC protect data integrity in server and workstation workloads.

Sustained-load behaviour

Registered signalling and single-rank 1Rx4 organisation keep timing stable during long compute runs. CL40 latency at 4800 MT/s delivers consistent throughput without the jitter seen in unbuffered configurations.

Thermals noise and power

Modules operate at 1.1 V without heat spreaders, relying on chassis airflow for cooling. Low voltage reduces power draw per DIMM, and the absence of moving parts means silent operation in dense rack environments.

How it compares

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

Price $1,672.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $26.14 per GB
Pricier than about 72% 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 numberMR38400-314K2
Total capacity64 GB (2 × 32 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
Heat spreaderNo
Memory rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock Industrial
In the box
Included items64 GB (2 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

How much power does the 1.1 V DDR5 4800 kit draw when the server runs continuously?

Each module operates at 1.10 V, the standard voltage for DDR5 4800, so power draw stays at the JEDEC baseline for 32 GB registered DIMMs.

What motherboard slots and firmware are required to run this 288-pin ECC RDIMM kit?

The kit is validated for ASRock Industrial EATX boards IMB-1900 and IMB-1902 with DDR5 RDIMM slots and ECC support enabled in BIOS.

Can the 1Rx4 registered modules share channels with other DDR5 ECC RDIMMs of different capacity?

Yes, 1Rx4 registered DIMMs can populate open channels alongside other DDR5 ECC RDIMMs if the motherboard's memory population rules allow mixed capacities.

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