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Four green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR5 4800 ECC RDIMM CL40 1.1V 288-pin ASRock W790 WS memory upgrade

SKU CH-5JQ7-9ZB7C

A 64 GB DDR5 ECC registered memory kit with four 16 GB modules running at 4800 MT/s and CL40 latency for ASRock W790 WS workstations

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V

Capacity 64GB 4X16GB

Show 3 more
  • ECC protection prevents data corruption in critical workloads
  • Registered design stabilises signal integrity on the ASRock W790 WS platform
  • 64 GB kit (4 × 16 GB) expands capacity for demanding applications
  • DDR5 4800 MT/s at 1.1 V delivers high throughput with lower power
  • 288-pin RDIMM form factor ensures direct compatibility with the target motherboard

ASRock W790 WS workstation memory

This 64 GB kit contains four 16 GB DDR5 ECC RDIMM modules validated for the ASRock W790 WS motherboard. Registered buffering and on-die error correction protect data integrity in professional workloads. The kit targets system builders who need guaranteed compatibility without manual tuning.

Sustained-load behaviour

Rated at 4800 MT/s with CL40 latency, the modules run at the JEDEC base speed for DDR5. Registered signalling reduces electrical load on the memory controller during continuous operation. ECC detection and correction maintain accuracy across long compute sessions.

Build and connectors

Each module uses a standard 288-pin DDR5 RDIMM form factor without a heat spreader. The 1.1 V operating voltage matches the platform specification for lower power draw. Four single-rank 1Rx8 sticks populate all channels for maximum bandwidth on the workstation board.

How it compares

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

Price $1,722.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $26.92 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 lineASRock Server Motherboard Compatible Series Memory
Model nameASRock DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-618K4
Total capacity64 GB (4 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items64 GB (4 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

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