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Green circuit board DDR4 LRDIMM module with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM ML21300-944K1 64GB DDR4 2666 ECC LRDIMM memory upgrade

SKU CH-MN8F-4JCPA

64 GB DDR4 2666 ECC LRDIMM module for Micron-compatible servers, CL19 1.20 V 288-pin load-reduced design

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeLoad Reduced
  • Rated voltage1.2 V
  • 64 GB capacity supports large server workloads
  • DDR4 2666 speed delivers high throughput
  • ECC LRDIMM design reduces electrical load
  • CL19 latency at 1.2 V ensures efficiency
  • 288-pin 4Rx4 module fits compatible Micron systems

64 GB DDR4-2666 ECC LRDIMM

This NEMIX RAM module delivers 64 GB of DDR4-2666 ECC Load Reduced memory in a single 288-pin LRDIMM. It is built for servers and workstations that require registered ECC stability at 1.2 V with CL19 latency. The 4Rx4 organisation suits high-capacity motherboards designed for load-reduced DIMMs. Buyers expanding Micron-compatible platforms can use this part to increase total system memory.

Check motherboard LRDIMM support and slot population

Verify that your server or workstation motherboard accepts DDR4 Load Reduced DIMMs and supports 4Rx4 modules at 2666 MT/s. Consult the system manual for maximum capacity per slot and approved population rules, as some platforms restrict LRDIMM mixing with standard RDIMMs. Ensure the BIOS is current enough to recognise 64 GB single-rank density before installation.

Thermals noise and power in normal operation

The module runs at 1.2 V without a heat spreader, relying on chassis airflow for cooling. In typical server workloads power draw stays modest and the bare PCB adds no acoustic noise beyond the system fans. Load Reduced buffering reduces electrical loading on the memory bus, helping maintain signal integrity at full 2666 MT/s speed during sustained use.

How it compares

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

Price $215.99
Cheaper than about 58% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $3.37 per GB
Cheaper than about 88% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineMicron Server/Workstaion Compatible Series Memory
Model nameMicron DDR4 2666 MHz ECC LRDIMM Load Reduced Server Memory
Part numberML21300-944K1
Total capacity64 GB
Product type288-Pin DDR4 LRDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeLoad Reduced
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsMICRON
In the box
Included items64 GB (1 × 64 GB) DDR4 2666 MHz PC4-21300 4Rx4 1.2 V CL19 288-PIN ECC LRDIMM Load Reduced Server Memory

Questions about this item

What does the package contain and is anything else required for installation?

The box contains one 64 GB DDR4 2666 CL19 1.20 V 288-pin ECC LRDIMM module; no extra parts are needed if your server has a free DDR4 LRDIMM slot.

How do I decide between this 64 GB 4Rx4 module and other capacities in the same series?

Choose this 64 GB 4Rx4 LRDIMM when your server needs maximum density per slot; select a smaller capacity from the same series if the platform limits rank count or total memory.

What does the PC4-21300 rating mean for actual server workloads?

PC4-21300 indicates a peak transfer rate of 21 300 MB/s at 2666 MT/s, delivering high bandwidth for memory-intensive applications while ECC and load-reduced design maintain signal integrity.

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