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Eight green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 512GB (8x64GB) DDR5 4800 CL40 ECC RDIMM ASRock W790 WS memory upgrade

SKU CH-YPZT-Z0QZM

Eight 64 GB DDR5 4800 ECC registered DIMMs totalling 512 GB, validated for the ASRock W790 WS workstation platform

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V

Capacity 512GB 8X64GB

Show 3 more
  • 512 GB total capacity from eight 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM for data-integrity protection
  • Low 1.10 V operating voltage reduces power draw
  • Validated for ASRock W790 WS workstation motherboard

512GB DDR5 ECC RDIMM kit for ASRock W790 WS

This 512GB kit contains eight 64GB DDR5 4800 registered DIMMs with ECC and a CL40 latency. It is built for the ASRock W790 WS workstation motherboard and targets professionals who need maximum registered memory capacity for compute-intensive workloads.

Installation notes and common issues

The modules are 288-pin DDR5 RDIMMs that install in the standard DIMM slots of the W790 WS board. Registered ECC memory must be populated according to the motherboard manual; incorrect slot order or mixing with unbuffered DIMMs will prevent the system from posting. Heat spreaders are not present, so airflow across the sticks should be verified in dense configurations.

DDR5 4800 registered ECC limits

The kit runs at the DDR5 4800 JEDEC base speed with 1.10V voltage and CL40 timings. Registered ECC operation adds a clock cycle of buffering, which caps maximum frequency compared to unbuffered alternatives. Total capacity is fixed at 512GB across eight slots; expansion beyond this kit requires a different motherboard platform.

How it compares

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

Price $13,541.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $26.45 per GB
Pricier than about 73% 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 numberMR38400-924K8
Total capacity512 GB (8 × 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
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock
In the box
Included items512 GB (8 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Other versions of this model

5 more in the same range

Questions about this item

How do I confirm the kit is running at DDR5 4800 CL40 after installation?

Enter the BIOS or UEFI and verify the memory frequency shows 4800 MT/s with CAS latency 40; the registered ECC RDIMM modules should also report 1.10 V and 2Rx4 organisation.

What ships in the box and do I need extra parts?

The package contains eight 64 GB DDR5 4800 CL40 288-pin ECC registered RDIMM modules for a total of 512 GB; no heat spreaders or additional cables are included or required.

Which capacity version should I choose for the ASRock W790 WS?

This kit is the single 512 GB (8 × 64 GB) configuration validated for the W790 WS workstation motherboard; no other capacities are offered under this part number.

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