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Two green DDR4 LRDIMM modules with black chips, no heat spreader

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR4 2933 PC4-23400 ECC LRDIMM ASRock EPYCD8-2T memory upgrade

SKU CH-NX40-W37BJ

A 128 GB DDR4-2933 ECC LRDIMM kit validated for the ASRock Rack EPYCD8-2T server motherboard

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL21
  • Buffer typeLoad Reduced
  • Rated voltage1.2 V

Capacity 128GB 2X64GB

  • 128 GB capacity with two 64 GB modules
  • DDR4 2933 speed rated at PC4-23400
  • ECC LRDIMM load-reduced design for signal integrity
  • 2 V operation at CL21 CAS latency
  • Validated for ASRock Rack EPYCD8-2T motherboard

128 GB DDR4 ECC LRDIMM kit

This 128 GB kit contains two 64 GB DDR4 ECC LRDIMM modules built for the ASRock Rack EPYCD8-2T motherboard. The load-reduced design helps maintain signal integrity across dense memory configurations. It targets IT professionals who need validated capacity for virtualization or database workloads.

CL21 at 2933 MT/s and 1.2 V

The modules run at DDR4 2933 (PC4-23400) with a CAS latency of 21 and a nominal voltage of 1.20 V. ECC and load-reduced buffering add error correction and electrical load reduction without increasing power draw per module. No heat spreader is fitted, so airflow across the DIMM slots handles thermal management.

Two-module kit with lifetime replacement

The package delivers the full 128 GB as a matched pair of 288-pin LRDIMMs. NEMIX RAM stress-tests each module under load before shipment and backs the kit with a lifetime replacement warranty supported by US-based IT staff. No additional software or accessories are included.

How it compares

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

Price $671.99
Pricier than about 55% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.25 per GB
Cheaper 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 DDR4 2666 MHz ECC LRDIMM Load Reduced Server Memory
Part numberML23400-944K2
Total capacity128 GB (2 × 64 GB)
Product type288-Pin DDR4 LRDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL21
ECC supportYes
Buffer typeLoad Reduced
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASRock
In the box
Included items128 GB (2 × 64 GB) DDR4 2933 MHz PC4-23400 4Rx4 1.2 V CL21 288-PIN ECC LRDIMM Load Reduced Server Memory KIT

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Questions about this item

How do I install the 288-Pin DDR4 LRDIMM modules in the ASRock EPYCD8-2T and what step is often missed?

Align the notch on each 64 GB module with the slot key, press firmly until both retaining clips click, then verify in BIOS that all 128 GB are detected at 2933 MT/s — the step often missed is enabling the correct memory profile so the kit runs at its rated speed rather than the default 2666 MT/s.

What maintenance or replacement will the 4Rx4 ECC LRDIMM kit need over its service life?

The modules have no moving parts and no heat spreader, so no routine maintenance is required; ECC corrects single-bit errors on the fly, and if a module ever fails the lifetime replacement warranty covers a direct swap of the faulty 64 GB stick.

What is the first limit that appears when the 1.2 V CL21 kit runs under sustained heavy load?

The CAS latency of CL21 at 2933 MT/s sets the timing ceiling; under continuous throughput the memory controller will hit this latency boundary before voltage or thermal constraints become an issue.

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