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Eight green DDR5 RDIMM sticks in anti-static tray

NEMIX RAM

NEMIX RAM 1TB (8x128GB) DDR5 4800 CL40 ECC RDIMM ASRock W790 WS

SKU CH-JS97-FSDPY

Eight 128 GB DDR5 registered ECC modules at 4800 MT/s CL40 1.10 V for ASRock W790 WS workstations

  • Total capacity1 TB (8 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 1 TB capacity across eight 128 GB modules for large memory workloads
  • DDR5 4800 speed with PC5-38400 bandwidth for high-throughput server tasks
  • ECC registered design with 4Rx4 organisation detects and corrects data errors
  • 10 V operating voltage reduces power draw in dense configurations
  • Validated for ASRock W790 WS motherboard compatibility out of the box

Capacity and configuration

This kit provides 1TB of memory using eight 128GB DDR5 RDIMMs. Each module operates at 4800MT/s with a CAS latency of CL40 and runs at 1.1V. The 4Rx4 organisation and registered design suit high-density server and workstation platforms.

Motherboard slot and voltage check

Verify that the ASRock W790 WS motherboard has eight free DDR5 RDIMM slots and that the BIOS supports 4Rx4 registered modules at 1.1V. Confirm the board's qualified vendor list includes this part number before ordering.

Sustained load behaviour

Registered ECC modules correct single-bit errors continuously during long compute runs. The 1.1V operating voltage keeps power draw steady across extended workloads. Eight ranks per channel maintain signal integrity when all slots are populated for hours.

How it compares

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

Price $33,521.99
Pricier than about 93% of the 21,161 comparable items (median $397.99).
Total capacity 1 TB (8 × 128 GB)
Higher than about 93% of the 20,941 comparable items (median 32 GB).
Price per GB $33.52 per GB
Pricier than about 90% 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 numberMR38400-744K8
Total capacity1 TB (8 × 128 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 rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items1 TB (8 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the kit include all eight 128GB modules or must any be purchased separately?

The kit contains eight 128GB modules for a total of 1TB. No additional modules are required.

Should I choose a different speed or latency for the ASRock W790 WS workstation?

This kit is built to DDR5 4800 with CL40 timings, matching the platform specification for the W790 WS.

What does the 4800 MT/s rating mean once the memory is installed in the workstation?

The modules run at 4800 MT/s with CL40 latency at 1.1V, providing registered ECC operation for the W790 WS platform.

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