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

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR4 2933 PC4-23400 CL21 4Rx4 1.2V 288-Pin ECC LRDIMM memory upgrade

SKU CH-31A2-JZ7YY

256 GB DDR4 server kit with four 64 GB ECC load-reduced DIMMs at 2933 MHz CL21, 1.2 V, 288-pin

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL21
  • Buffer typeLoad Reduced
  • Rated voltage1.2 V

Capacity 256GB 4X64GB

  • 256 GB total capacity with four 64 GB modules for high-density server memory
  • Load-reduced ECC DDR4 at 2933 MHz with CL21 latency for stable error-corrected performance
  • 20 V operation reduces power draw in dense EPYC platforms
  • 288-pin LRDIMM form factor designed for ASRock Rack ROMED8-2T compatibility
  • Built with major OEM Samsung Micron Hynix chips and stress-tested under load

256GB ECC LRDIMM kit for ASRock EPYC boards

This kit provides 256GB of DDR4 2933 memory across four 64GB load-reduced DIMMs. It targets administrators upgrading ASRock Rack ROMED8-2T motherboards running AMD EPYC processors where registered ECC capacity is required.

Quad-rank 4Rx4 modules at 1.2V

Each module uses a 4Rx4 organisation with CL21 latency and operates at 1.20V. The load-reduced design reduces electrical load on the memory controller, allowing the full 256GB kit to populate all four slots without exceeding the platform's rank-per-channel limits.

Verify ROMED8-2T qualification

Confirm the motherboard firmware supports 64GB LRDIMMs at 2933MT/s and review the vendor's memory population guide for correct slot order. The kit contains no heat spreaders, so chassis airflow must meet the server's thermal specification for high-density memory configurations.

How it compares

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

Price $1,214.99
Pricier than about 62% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $4.75 per GB
Cheaper than about 80% 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 LRDIMM Load Reduced Server Memory
Part numberML23400-944K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 LRDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL21
ECC supportYes
Buffer typeLoad Reduced
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASRock
In the box
Included items256 GB (4 × 64 GB) DDR4 2933 MHz PC4-23400 4Rx4 1.2 V CL21 288-PIN ECC LRDIMM Load Reduced Server Memory KIT

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Questions about this item

Will the 4Rx4 LRDIMM modules need any firmware updates or specific BIOS settings on the ASRock ROMED8-2T to stay stable over time?

The kit is built from major-brand DRAM and tested under load for the ASRock ROMED8-2T; no extra firmware steps are required beyond normal BIOS memory training.

What is the first limit reached when the four 64 GB modules run at 2933 MT/s CL21 continuously?

The 1.20 V operating voltage and 288-pin DDR4 LRDIMM electrical spec define the sustained envelope; the memory controller on the EPYC platform will throttle before the modules exceed their rated speed.

How loud and hot do the bare 64 GB LRDIMMs get when the server runs all day at 2933 MT/s?

With no heat spreader and a 1.2 V load-reduced design, the modules rely on chassis airflow; typical server fan curves keep them within normal DDR4 thermal limits without adding audible noise.

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