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Green rectangular DDR4 LRDIMM module with black chips and gold contacts

NEMIX RAM

NEMIX RAM 64GB DDR4 2666 PC4-21300 CL19 4Rx4 1.2V 288-PIN ECC LRDIMM memory upgrade

SKU CH-6C29-8PMCJ

64GB DDR4 2666 ECC LRDIMM server memory module for ASRock EPYC motherboards

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeLoad Reduced
  • Rated voltage1.2 V

Capacity 64GB

  • 64 GB capacity expands server memory headroom for virtualization workloads
  • DDR4 2666 speed delivers 21300 MT/s bandwidth for data-intensive applications
  • ECC LRDIMM technology corrects single-bit errors to protect mission-critical data integrity
  • 2 V operation reduces power draw per module in dense configurations
  • Validated for ASRock Rack ROMED8-2T EPYC motherboards ensuring drop-in compatibility

ASRock EPYC server memory upgrade

This 64GB DDR4 LRDIMM is validated for the ASRock Rack ROMED8-2T motherboard running AMD EPYC processors. It targets administrators expanding memory capacity in enterprise servers and workstations that require registered ECC modules.

Sustained load stability with load-reduced design

The 4Rx4 organisation and load-reduced buffering lower electrical loading on the memory bus, allowing the module to maintain 2666 MT/s throughput under continuous multi-threaded workloads. ECC correction and 1.20V operation keep error rates low during extended compute cycles without increasing power draw.

Replaces lower-capacity RDIMMs when density matters

Moving from standard registered DIMMs to this single 64GB LRDIMM frees DIMM slots for future expansion while delivering the same CL19 latency. The upgrade is worthwhile when the platform supports load-reduced memory and the workload demands more gigabytes per channel than RDIMM densities allow.

How it compares

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

Price $238.99
Cheaper than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $3.73 per GB
Cheaper than about 86% 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 numberML21300-944K1
Total capacity64 GB
Product type288-Pin DDR4 LRDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeLoad Reduced
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASRock
In the box
Included items64 GB (1 × 64 GB) DDR4 2666 MHz PC4-21300 4Rx4 1.2 V CL19 288-PIN ECC LRDIMM Load Reduced Server Memory

Other versions of this model

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Questions about this item

How much power does the 1.2V 64GB LRDIMM draw when the server runs continuously?

The module operates at 1.2V; DDR4 LRDIMM design reduces electrical load on the memory bus, helping keep power draw lower than standard registered DIMMs at the same capacity.

What motherboard slot and chipset support are required to install this 288-pin DDR4 LRDIMM?

A 288-pin DDR4 slot with ECC and load-reduced support is needed; the kit is validated for the ASRock Rack ROMED8-2T motherboard used with AMD EPYC processors.

Will this CL19 2666MHz module work alongside older DDR4 RDIMMs already in my EPYC system?

Mixing LRDIMM with standard RDIMM is not supported on EPYC platforms; all populated slots must use the same load-reduced technology for the system to boot and run stably.

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