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Eight green DDR4 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 512GB (8x64GB) DDR4 2666 CL19 ECC RDIMM memory upgrade

SKU CH-4M1W-919ZB

Eight-module 512GB DDR4-2666 ECC registered kit with CL19 latency and 1.2V operation for ASRock Rack EPYC server motherboards

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V

Capacity 512GB 8X64GB

  • 512 GB total capacity from eight 64 GB modules
  • DDR4 2666 speed rated at PC4-21300
  • ECC registered design detects and corrects memory errors
  • 2 V operation reduces server power draw
  • Validated for ASRock Rack ROMED8-2T EPYC motherboards

512GB DDR4 2666 ECC RDIMM kit

This 512GB kit contains eight 64GB DDR4 2666MHz registered DIMMs with ECC and a CL19 latency. It runs at 1.2V and uses 288-pin 2Rx4 modules built with major OEM chips. The kit is validated for the ASRock Rack ROMED8-2T motherboard supporting AMD EPYC processors.

Server builders needing maximum registered capacity

This kit suits administrators upgrading an ASRock Rack ROMED8-2T platform to its full 512GB registered memory limit with ECC reliability. It is not for desktop PCs or workstations that require unbuffered UDIMM memory, nor for systems limited to lower densities or slower DDR4 speeds.

Eight-module 2Rx4 registered configuration

The decisive specification is the eight-module 2Rx4 registered layout delivering 512GB at DDR4 2666 with CL19 timing. This exact rank and density combination must match the motherboard qualified vendor list for the EPYC platform to initialise correctly.

How it compares

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

Price $2,328.99
Pricier than about 70% 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 $4.55 per GB
Cheaper than about 81% 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 numberMR21300-924K8
Total capacity512 GB (8 × 64 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 items512 GB (8 × 64 GB) DDR4 2666 MHz PC4-21300 2Rx4 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Other versions of this model

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Questions about this item

Does the 512GB kit include eight 64GB modules or do I need to buy them separately?

The kit contains eight 64GB DDR4 2666 CL19 ECC RDIMM modules for a total of 512GB.

Should I choose the CL19 2666MT/s kit or a different speed grade for my ASRock Rack ROMED8-2T?

This CL19 2666MT/s kit matches the motherboard's supported DDR4 2666 PC4-21300 specification.

Will the registered ECC 2Rx4 modules run at the rated 2666MT/s once installed in the EPYC platform?

The modules are validated for DDR4 2666 PC4-21300 at 1.20V with CL19 timings on the target motherboard.

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