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Two green DDR4 RDIMM sticks, bare chips, no heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR4 2666 CL19 ECC RDIMM memory upgrade

SKU CH-X1DM-R7565

64 GB DDR4 2666 ECC registered dual-rank kit (2 × 32 GB, 1.2 V, CL19, 288-pin) validated for ASRock Rack EPYCD8-2T motherboards

  • Capacity64GB (2 x 32GB)
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V

Capacity 64GB 2X32GB

  • 64 GB capacity supports heavy server workloads
  • Dual 32 GB modules enable dual-channel throughput
  • DDR4 2666 speed matches platform specification
  • ECC registered design protects data integrity
  • 2 V operation reduces power draw

ASRock EPYCD8-2T DDR4 ECC Kit

This 64 GB kit contains two 32 GB registered DDR4 2666 modules built for ASRock Rack EPYCD8-2T series motherboards. It targets server and workstation administrators who need ECC RDIMM capacity for mission-critical workloads. The modules run at 1.2 V with CL19 latency and a 2Rx4 organisation. They provide a straightforward path to populating compatible DIMM slots with validated memory.

2Rx4 registered ECC modules

Each stick is a 288-pin RDIMM using major OEM Samsung, Micron or Hynix chips and includes on-die error correction. The registered buffer reduces electrical load on the memory controller, which helps stability in multi-DIMM server configurations. No heat spreader is fitted, so airflow across the PCB is unimpeded. The kit supplies exactly two modules to match the motherboard's channel population guidelines.

Tool-free DIMM installation

Installation follows standard server procedure: power down, open the chassis, align the notch on the 288-pin edge connector, and press until the retention clips engage. The most common issue is mixing registered ECC RDIMMs with unbuffered or non-ECC modules, which prevents the system from posting. Verifying that the BIOS recognises the full 64 GB at 2666 MT/s after the first boot confirms correct seating and compatibility.

Highlights

  • 64 GB capacity supports heavy server workloads
  • Dual 32 GB modules enable dual-channel throughput
  • DDR4 2666 speed matches platform specification
  • ECC registered design protects data integrity
  • 2 V operation reduces power draw

Specifications

BrandNEMIX RAM
SeriesASRock Server Motherboard Compatible Series Memory
ModelASRock DDR4 2666MHZ ECC RDIMM Registered Server Memory
Part NumberMR21300-324K2
Capacity64GB (2 x 32GB)
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemASRock
CAS LatencyCL19
Heat SpreaderNo
Type288-Pin DDR4 RDIMM
Rank2Rx4
FeaturesDDR4 ECC Registered RDIMM Server Motherboard Compatible
Package Content64GB (2X32GB) DDR4 2666MHZ PC4-21300 2Rx4 1.2V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

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Questions about this item

Will the CL19 latency require any adjustment over time?

CL19 is a fixed timing value set by the module SPD; no maintenance or replacement is needed for latency.

What limits sustained throughput on these 2Rx4 modules?

The DDR4 2666 PC4-21300 interface caps continuous bandwidth at 21300 MB/s.

How much heat and power will the 1.20 V kit produce running all day?

Each 32 GB RDIMM operates at 1.20 V with no heat spreader; typical power stays within standard DDR4 registered DIMM limits.

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