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Four green DDR4 LRDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM ML21300-944K4 256GB (4x64GB) DDR4 2666 ECC LRDIMM CL19 memory upgrade

SKU CH-3TN8-VFF31

256 GB DDR4 2666 ECC LRDIMM kit in four 64 GB modules at CL19 and 1.2 V for ASRock EPYC server boards

  • 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 across four 64GB modules
  • DDR4 2666MHz speed with PC4-21300 bandwidth rating
  • ECC LRDIMM load-reduced design for server reliability
  • CL19 latency at 1.2V operating voltage
  • 288-pin 4Rx4 configuration compatible with ASRock Rack ROMED8-2T EPYC motherboard

ASRock EPYC DDR4 LRDIMM kit

This 256GB kit contains four 64GB DDR4 2666 load-reduced ECC modules built for the ASRock Rack ROMED8-2T motherboard. Each module runs at 1.2V with CL19 latency and a 4Rx4 organisation. The 288-pin LRDIMM form factor targets EPYC server platforms that require registered memory.

Upgrade from lower-capacity RDIMM or non-ECC memory

Replacing smaller RDIMM kits or unbuffered modules with this 4Rx4 LRDIMM set increases total capacity to 256GB while maintaining error correction. The jump is worthwhile when workloads exceed the addressable limits of standard registered DIMMs or when the platform specifically requires load-reduced topology for signal integrity.

Verify motherboard slot count and BIOS revision

Confirm the ROMED8-2T has four available DDR4 slots and that the current BIOS supports 64GB LRDIMM density per slot. Check the system documentation for any population rules that restrict mixing ranks or require specific slot filling order before installation.

Highlights

  • 256GB total capacity across four 64GB modules
  • DDR4 2666MHz speed with PC4-21300 bandwidth rating
  • ECC LRDIMM load-reduced design for server reliability
  • CL19 latency at 1.2V operating voltage
  • 288-pin 4Rx4 configuration compatible with ASRock Rack ROMED8-2T EPYC motherboard

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

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Questions about this item

Does the 288-pin LRDIMM fit the ASRock Rack ROMED8-2T memory slots?

Yes, the kit is built for that motherboard and uses the standard 288-pin DDR4 LRDIMM form factor required by the EPYC platform.

What BIOS setting or population rule is often missed when installing four 64 GB LRDIMMs?

The board expects a specific slot sequence for quad-rank LRDIMMs; skipping the manual’s population order is the step most installers get wrong.

How can I tell when one of the four 64 GB modules needs replacement?

ECC will log correctable errors; a rising count on any single DIMM signals that module should be swapped before uncorrectable faults appear.

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