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Single green 288-pin DDR5 RDIMM module, no heat spreader, black chips on both sides

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 CL40 1.1V 4Rx4 ECC RDIMM ASRock W790 WS

SKU CH-0X2Y-MAPHJ

128GB DDR5 4800 ECC registered RDIMM with CL40 latency and 1.1V operation for ASRock W790 WS workstations

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V

Capacity 128GB

Show 3 more
  • 128 GB single module simplifies capacity scaling
  • DDR5 4800 speed handles heavy workloads
  • CL40 latency at 1.1 V keeps power low
  • ECC registered design protects data integrity
  • 288-pin RDIMM fits ASRock W790 WS motherboard

128GB DDR5 4800 ECC RDIMM for ASRock W790 WS

This single 128GB registered DIMM operates at 4800MT/s with CL40 latency and 1.1V. It uses a 4Rx4 organisation and 288-pin DDR5 form factor for the ASRock W790 WS workstation motherboard. ECC and registered buffering protect data integrity in demanding workloads.

Suited for memory expansion on the ASRock W790 WS

Buyers needing ECC RDIMM modules validated for this specific motherboard can use this part. Builders who require non-ECC memory, unbuffered DIMMs, or a different pin count should look elsewhere. Systems that do not support registered DDR5 cannot accept this module.

The registered ECC design decides fit

Registered buffering and ECC are mandatory for the target workstation platform. If the motherboard or CPU memory controller does not support registered DDR5 with ECC, this DIMM will not function. Verify that the platform requires registered ECC RDIMMs before purchasing.

How it compares

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

Price $3,542.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $27.68 per GB
Pricier than about 77% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineASRock Server Motherboard Compatible Series Memory
Model nameASRock DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K1
Total capacity128 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 items128 GB (1 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Other versions of this model

5 more in the same range

Questions about this item

How can I confirm the module is running at CL40 after installation?

Enter the BIOS or use a tool such as CPU-Z to verify the reported CAS latency matches CL40 and that the operating voltage reads 1.10 V.

What is included in the package and do I need any extra parts?

The box contains one 128 GB 288-pin DDR5 RDIMM; no additional cables, brackets or heat spreaders are required for installation.

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

This kit provides a single 128 GB registered ECC module designed for the W790 WS platform; select it when you need maximum capacity per slot.

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