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Four green DDR4 RDIMM modules, bare circuit boards with black chips, 288 pins each

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR4 2666 ECC RDIMM CL19 1.2V 2Rx4 288-pin memory upgrade

SKU CH-RQ44-0Q056

128 GB DDR4 2666 ECC registered server memory kit, four 32 GB modules at CL19 1.2 V for ASRock EPYCD8-2T motherboards

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V

Capacity 128GB 4X32GB

  • 128GB total capacity with four 32GB modules
  • DDR4 2666 speed rated at PC4-21300
  • ECC registered design protects data integrity
  • 2V operation at CL19 latency timing
  • 2Rx4 288-pin RDIMM form factor for ASRock EPYCD8-2T

128GB DDR4 ECC RDIMM Kit for ASRock EPYCD8-2T

This registered DDR4 memory kit delivers 128GB across four 32GB modules for ASRock EPYCD8-2T series motherboards. ECC error correction and registered buffering protect data integrity in server and workstation workloads. The kit operates at 2666MHz with CL19 latency at 1.20V.

Sustained Load Stability and Compatibility

Modules are stress-tested under load to verify reliability during continuous operation in mission-critical environments. Major OEM chips from Samsung Micron or Hynix provide consistent timing across all ranks. Registered design reduces electrical load on the memory controller during extended sessions.

Straightforward DIMM Installation Without Heat

Four 288-pin RDIMMs install in standard DDR4 slots following the motherboard manual population rules. Absence of heat spreaders eases fitment in dense server chassis with limited clearance. Buyers needing non-ECC unbuffered memory or capacities beyond 128GB should select a different kit.

How it compares

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

Price $814.99
Pricier than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.37 per GB
Cheaper than about 62% 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 RDIMM Registered Server Memory
Part numberMR21300-324K4
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASRock
In the box
Included items128 GB (4 × 32 GB) DDR4 2666 MHz PC4-21300 2Rx4 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Other versions of this model

5 more in the same range

Questions about this item

How much power does the 1.2 V DDR4 2666 kit draw under sustained load?

Each 32 GB module runs at 1.20 V, so the four-stick kit operates at standard DDR4 voltage without extra power overhead.

What motherboard feature is required to use these registered ECC modules?

The board must support DDR4 RDIMM memory with ECC and registered buffering; standard consumer slots will not work.

Will the 2Rx4 organization work alongside older 1Rx4 DDR4 sticks in the same server?

Mixing 2Rx4 modules with 1Rx4 sticks is not recommended; the server memory controller expects matched rank geometry for stability.

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