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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

  • Capacity64GB
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredLoad Reduced
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 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.

Highlights

  • 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

Specifications

BrandNEMIX RAM
SeriesLenovo Server/Workstation Compatible Series Memory
ModelIBM DDR4 2666MHZ ECC LRDIMM Load Reduced Server Memory
Part NumberML21300-944K1
Capacity64GB
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredLoad Reduced
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemLenovo
CAS LatencyCL19
Heat SpreaderNo
Type288-Pin DDR4 LRDIMM
Rank4Rx4
FeaturesDDR4 ECC LRDIMM Load Reduced Server Motherboard Compatible
Package Content64GB (1X64GB) DDR4 2666MHZ PC4-21300 4Rx4 1.2V 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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