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Four green 288-pin DDR4 LRDIMM modules, bare chips, no heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR4 2666 ECC LRDIMM CL19 288-pin memory upgrade

SKU CH-MNHK-63QN7

256 GB DDR4 server kit with four 64 GB ECC LRDIMM modules at 2666 MHz CL19 1.20 V for ASRock EPYCD8-2T

  • Capacity256GB (4 x 64GB)
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredLoad Reduced
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V

Capacity 256GB 4X64GB

  • 256GB total capacity supports heavy server workloads
  • Four 64GB modules fill four slots efficiently
  • DDR4 2666 speed delivers PC4-21300 bandwidth
  • ECC LRDIMM with 4Rx4 rank ensures data integrity
  • 20V operation at CL19 latency reduces power draw

Server-grade capacity

This 256GB kit delivers four 64GB DDR4 2666 LRDIMM modules for the ASRock Rack EPYCD8-2T motherboard. ECC protection and load-reduced architecture keep data integrity intact under sustained enterprise workloads. IT professionals choose it for virtualisation hosts, database nodes and high-density compute clusters where maximum DIMM slots are populated.

Headroom and limits

Four ranks per module at CL19 latency and 1.2V provide the bandwidth the platform specifies without exceeding the board's qualified speed. The 256GB total fills every slot, so no further expansion is possible on this motherboard. Workloads that demand more memory per channel or higher frequency will hit the platform ceiling.

Upgrade path

The kit replaces lower-capacity registered or unbuffered DDR4 DIMMs that cannot address this density. The jump is worth it when applications exhaust the previous memory ceiling and the motherboard firmware supports 4Rx4 LRDIMM topology. Buyers who need more than four modules or a faster data rate must change platform.

Highlights

  • 256GB total capacity supports heavy server workloads
  • Four 64GB modules fill four slots efficiently
  • DDR4 2666 speed delivers PC4-21300 bandwidth
  • ECC LRDIMM with 4Rx4 rank ensures data integrity
  • 20V operation at CL19 latency reduces power draw

Specifications

BrandNEMIX RAM
SeriesASRock Server Motherboard Compatible Series Memory
ModelASRock DDR4 2666MHZ ECC LRDIMM Load Reduced Server Memory
Part NumberML21300-944K4
Capacity256GB (4 x 64GB)
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredLoad Reduced
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemASRock
CAS LatencyCL19
Heat SpreaderNo
Type288-Pin DDR4 LRDIMM
Rank4Rx4
FeaturesDDR4 ECC LRDIMM Load Reduced Server Motherboard Compatible
Package Content256GB (4X64GB) DDR4 2666MHZ PC4-21300 4Rx4 1.2V CL19 288-PIN ECC LRDIMM Load Reduced Server Memory KIT

Other versions of this model

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Questions about this item

Will the four 64GB LRDIMMs run together with any existing DDR4 2666 registered modules I keep in the ASRock EPYCD8-2T?

The kit uses 4Rx4 Load Reduced DDR4 2666 at 1.2V CL19; mixing with standard registered DIMMs is not supported on this platform, so populate all channels with the matched LRDIMM kit.

How can I verify the 256GB kit is detected at 2666 MT/s with ECC active after installation?

Enter the BIOS or run a tool such as dmidecode; you should see four 64GB LRDIMMs at PC4-21300, CL19, 1.2V with ECC enabled.

What exactly ships in the box and do I need any extra brackets or cables?

The package contains four 64GB 288-pin DDR4 ECC LRDIMM modules only; no brackets, cables or additional hardware are included or required.

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