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Green 288-pin DDR4 LRDIMM server module, 128GB, no heat spreader

A-Tech

A-Tech 128GB DDR4 2666MHz ECC LRDIMM Server Memory

SKU CH-2CM1-HR1NH

A 128 GB DDR4 2666 MHz ECC LRDIMM module with CL15 latency and 1.2 V operation for server memory upgrades

  • Capacity128GB
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL15
  • Voltage1.20V
  • ECCYes
  • 128GB single module expands server memory capacity
  • DDR4 2666MHz PC4-21300 speed handles heavy workloads
  • ECC Load Reduced DIMM protects data integrity
  • 288-pin DDR4 form factor fits compatible server slots
  • 20V standard voltage ensures efficient operation

128GB DDR4 2666MHz ECC LRDIMM Server Module

This 128GB DDR4 2666MHz ECC LRDIMM module is built for servers that require high-capacity registered memory. It operates at 1.2V with a CAS latency of 15 and uses a 288-pin form factor. The load-reduced design helps reduce electrical load on the memory controller in dense configurations.

Load-Reduced DIMM Limits and LRDIMM Mixing Rules

Load-reduced DIMMs buffer both data and address signals which allows higher capacities per channel than standard RDIMMs. Mixing LRDIMMs with RDIMMs or UDIMMs in the same system is not supported and will prevent boot. Population rules vary by platform so the maximum supported capacity per channel depends on the specific server model.

Verify Server Qualified Vendor List

Check the server manufacturer Qualified Vendor List to confirm this part number is validated for your exact model. Ensure the system supports 128GB LRDIMM modules and the correct 2S4Rx4 rank structure. Verify available 288-pin DDR4 slots and the maximum memory capacity per processor before ordering.

Highlights

  • 128GB single module expands server memory capacity
  • DDR4 2666MHz PC4-21300 speed handles heavy workloads
  • ECC Load Reduced DIMM protects data integrity
  • 288-pin DDR4 form factor fits compatible server slots
  • 20V standard voltage ensures efficient operation

Specifications

BrandA-Tech
SeriesSamsung RAM Equivalent Replacement Memory
ModelM386AAK40B40-CWD
Part NumberM386AAK40B40-CWD
Capacity128GB
Type288-Pin DDR4 SDRAM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL15
Voltage1.20V
ECCYes
Buffered/RegisteredLoad Reduced
Rank2S4Rx4 (8Rx4)
ChipsetMajor Brand Chipset
Heat SpreaderNo
FeaturesEquivalent Replacement for Samsung M386AAK40B40-CWD

Questions about this item

Should I pick the 128 GB module or combine smaller sticks?

The module is a single 128 GB stick; choose it when your server has a free 288-pin slot and the qualified-vendor list approves this capacity.

What does the 2666 MHz rating deliver in a live server?

It runs at 2666 MT/s with CL15 latency at 1.20 V, giving the bandwidth and timing the platform expects for DDR4-2666 workloads.

How does the ECC LRDIMM interface affect maximum capacity?

The load-reduced design with 8Rx4 3DS/TSV ranks lets the memory controller drive this 128 GB module without the electrical load limits of standard RDIMMs.

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