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Green rectangular DDR4 LRDIMM module with black chips and gold contacts

NEMIX RAM

NEMIX RAM 64GB DDR4 2666MHz CL19 ECC LRDIMM 4Rx4 1.2V 288-pin memory upgrade

SKU CH-DJQH-GMYPX

A 64GB DDR4 2666MHz ECC LRDIMM module with CL19 latency and 1.2V operation for compatible Lenovo ThinkSystem servers

  • Total capacity64 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeLoad Reduced
  • Rated voltage1.2 V
  • 64 GB single module expands server capacity
  • Load-reduced ECC design improves data integrity
  • DDR4 2666 MHz speed matches system spec
  • 2 V operation reduces power draw
  • Validated for Lenovo ThinkSystem 4X77A78614

Capacity and form factor

This NEMIX RAM module delivers 64GB in a single 288-pin DDR4 LRDIMM. It is built for servers and workstations that require load-reduced memory to support high-density configurations.

Registered ECC with 4Rx4 organisation

The module operates at 2666MHz with a CL19 latency and 1.2V voltage. Its 4Rx4 rank structure and load-reduced buffering reduce electrical load on the memory bus, allowing larger total system memory than standard registered DIMMs.

Suited for Lenovo ThinkSystem upgrades

This part matches Lenovo part number 4X77A78614 and is validated for compatible ThinkSystem platforms. Buyers who need non-ECC memory, standard RDIMMs, or modules for consumer desktop boards should look at something else.

How it compares

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

Price $221.99
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 $3.47 per GB
Cheaper than about 87% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineLenovo Server/Workstation Compatible Series Memory
Model nameLenovo 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 systemsLenovo
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 2666MHz mean once this module is installed in a Lenovo ThinkSystem server?

The module runs at 2666 MT/s, delivering PC4-21300 bandwidth when the memory controller is configured for that speed.

How does the LRDIMM interface affect usable capacity and signal loading?

Load-reduced DIMM buffering isolates the 4Rx4 ranks so the memory controller sees only one electrical load per slot.

Will the 288-pin LRDIMM fit in a standard DDR4 UDIMM slot on a workstation board?

No, the LRDIMM key notch differs from UDIMM and RDIMM slots; it requires a server motherboard with LRDIMM support.

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