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Green rectangular circuit board with black memory chips and gold edge connectors

A-Tech

A-Tech 64GB DDR4 2666 ECC LRDIMM 4Rx4 Samsung M386A8K40BM2-CTD7Q CTD7Y server RAM

SKU CH-RX6B-GS9TY

64 GB DDR4 2666 ECC load-reduced DIMM with 4Rx4 organisation and CL19 latency for high-density server memory slots

  • Capacity64GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredLoad Reduced
  • 64GB capacity handles heavy server workloads
  • DDR4 2666MHz speed delivers fast data throughput
  • ECC LRDIMM technology corrects errors and reduces electrical load
  • Samsung chipset ensures reliable component quality
  • CL19 latency at 1.20V balances performance and efficiency

64GB DDR4 2666 ECC LRDIMM for Servers

This 64GB module targets server and workstation platforms that require registered ECC memory. It operates at DDR4 2666 speed with CL19 latency and 1.20V voltage. The load-reduced design places less electrical load on the memory controller than standard registered DIMMs. Buyers needing non-ECC or unbuffered memory for consumer boards cannot use this module.

288-Pin DIMM Fits DDR4 Server Slots

The stick uses the 288-pin DDR4 DIMM form factor and requires a motherboard slot wired for DDR4 LRDIMM signalling. Because it is load-reduced, it frees the memory controller to populate more slots per channel than a standard registered DIMM of the same rank. Systems that only accept UDIMM or RDIMM modules will not recognise this part.

64GB Capacity with 4Rx4 Organisation

A single module delivers 64GB using a 4Rx4 Samsung chipset arrangement, giving high density for virtualisation or large dataset workloads. The four-rank layout maximises capacity per slot but may limit the maximum number of modules per channel on some platforms. Workloads exceeding the module count supported by the memory controller will require a different rank configuration.

Highlights

  • 64GB capacity handles heavy server workloads
  • DDR4 2666MHz speed delivers fast data throughput
  • ECC LRDIMM technology corrects errors and reduces electrical load
  • Samsung chipset ensures reliable component quality
  • CL19 latency at 1.20V balances performance and efficiency

Specifications

BrandA-Tech
SeriesCompatible Replacement for Samsung
ModelM386A8K40BM2-CTD7Q, M386A8K40BM2-CTD7Y
Capacity64GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
ChipsetSamsung Chipset
FeaturesM386A8K40BM2-CTD7Q, M386A8K40BM2-CTD7Y

Questions about this item

What is the CAS latency figure that governs timing under sustained load?

The module operates at CL19, which is the primary timing parameter that affects latency during continuous operation.

How much heat and power does a single 64 GB LRDIMM draw at 1.20 V?

At the standard DDR4 voltage of 1.20 V the module runs within the normal thermal envelope for load-reduced server memory; no additional cooling beyond typical chassis airflow is required.

Which server platform already supports DDR4 2666 ECC LRDIMM 4Rx4 288-pin modules?

The module is a compatible replacement for Samsung M386A8K40BM2-CTD7Q and M386A8K40BM2-CTD7Y, so any system qualified for those part numbers will accept it.

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