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Eight bare green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 256GB (8x32GB) DDR5 4800 CL40 ECC RDIMM ASRock W790 WS memory upgrade

SKU CH-SHAN-RWR3K

256GB DDR5 4800 CL40 ECC registered kit with eight 32GB 1Rx4 modules at 1.1V for ASRock W790 WS workstations

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V

Capacity 256GB 8X32GB

Show 3 more
  • 256GB total capacity across eight 32GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM design for data integrity
  • CL40 latency at 1.1V operating voltage
  • Validated compatibility with ASRock W790 WS motherboard

256 GB DDR5 ECC RDIMM kit

This 256 GB kit contains eight 32 GB DDR5 4800 registered DIMMs with ECC and a CL40 latency. It is built for the ASRock W790 WS workstation motherboard and suits professionals who need maximum memory capacity for virtualization, rendering or large dataset workloads.

Verify W790 WS slot population rules

Confirm that the ASRock W790 WS board accepts eight registered DIMMs at the rated speed and that your CPU supports the full 256 GB configuration. Check the motherboard manual for required slot order and any BIOS version needed for eight-module operation.

Sustained load stability with ECC

Registered modules and on-die ECC maintain data integrity during continuous multi-threaded workloads such as compile farms or simulation runs. The 1.1 V operating voltage keeps power draw consistent across all eight sticks during extended sessions.

How it compares

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

Price $6,560.99
Pricier than about 82% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $25.63 per GB
Pricier than about 70% 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 numberMR38400-314K8
Total capacity256 GB (8 × 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
In the box
Included items256 GB (8 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Other versions of this model

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Questions about this item

What comes in the 256GB kit and do I need anything else to install it?

The kit contains eight 32GB DDR5 4800 CL40 ECC RDIMM modules. No extra parts are required; install them directly into the 288-pin slots on the ASRock W790 WS motherboard.

Why choose this 8x32GB kit instead of a different capacity or speed?

This kit provides the full 256GB capacity at DDR5 4800 with CL40 latency and 1.1V operation, matching the W790 WS platform's supported memory specification.

What does the CL40 rating mean for real-world workloads on the W790 WS?

CL40 is the CAS latency at 4800 MT/s; it determines the delay before data is available and is the standard timing for DDR5 4800 ECC RDIMMs on this platform.

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