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Single green DDR4 LRDIMM module with black chips no heat spreader 288 pins

NEMIX RAM

NEMIX RAM 64GB 1x64GB DDR4 2666 PC4-21300 4Rx4 CL19 1.2V 288-Pin ECC LRDIMM Lenovo 01DE975 memory upgrade

SKU CH-ZRGP-42NJB

Adds 64 GB of DDR4 2666 ECC LRDIMM capacity to compatible Lenovo 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 in one slot
  • DDR4 2666 speed matches Lenovo 01DE975 specification
  • ECC load-reduced design maintains data integrity under heavy workloads
  • CL19 latency at 1.2 V delivers stable registered performance
  • Samsung Micron Hynix chipset ensures enterprise-grade reliability

Lenovo 01DE975 Compatible LRDIMM

This 64GB DDR4 2666 ECC load-reduced module is built for Lenovo servers and workstations that require registered memory with error correction. It suits IT teams expanding capacity in supported platforms without mixing unbuffered or standard registered DIMMs.

Upgrade from lower-density or non-ECC DDR4

Replacing smaller LRDIMMs or non-ECC modules with this 4Rx4 64GB stick adds substantial capacity while maintaining signal integrity on loaded memory buses. The jump is worth it when the platform qualifies PC4-21300 CL19 1.2V parts and the workload demands maximum DIMM density per slot.

Tool-free DIMM installation with standard alignment

The 288-pin form factor seats in the usual DDR4 server slots; ejector clips secure the module once pressed evenly. Common issues arise when the system BIOS does not recognise the 4Rx4 organisation or when mixed-rank populations violate the platform memory population rules.

How it compares

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

Price $236.99
Cheaper than about 57% 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 $3.70 per GB
Cheaper than about 86% 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 nameIBM 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

Does the 288-pin DDR4 LRDIMM fit a standard server DIMM slot?

Yes, the 288-pin DDR4 LRDIMM form factor matches standard DDR4 server DIMM slots used in compatible Lenovo systems.

What BIOS setting or population rule is often missed when installing this 4Rx4 load-reduced module?

Load-reduced DIMMs require the memory controller to support LRDIMM protocol; verify the server BIOS is updated and the slot population order follows the Lenovo service guide for 4Rx4 modules.

Will the Samsung, Micron or Hynix DRAM chips on this module need replacement during the server's lifespan?

The DRAM chips are soldered to the PCB and are not user-replaceable; if a chip fails the entire 64GB module must be replaced.

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