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Four green DDR4 LRDIMM modules with black heat spreaders, 288-pin, 256GB kit

A-Tech

A-Tech 256GB (4x64GB) DDR4 2666 ECC LRDIMM 4Rx4 Server RAM

SKU CH-GTR9-EDPXT

A 256 GB quad-channel kit of four 64 GB DDR4 2666 ECC load-reduced DIMMs for servers and workstations

  • Capacity256GB (4 x 64GB)
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredLoad Reduced

Capacity 256GB (4 x 64GB)

  • 256 GB total capacity across four 64 GB modules
  • DDR4 2666 MHz speed rated at PC4-21300 bandwidth
  • ECC Load Reduced DIMM corrects errors for server stability
  • 4Rx4 quad-rank organisation increases memory density per slot
  • 2 V standard DDR4 voltage reduces power draw

256GB DDR4 2666 ECC LRDIMM Kit

This 256GB kit contains four 64GB DDR4 2666 modules built as ECC Load Reduced DIMMs. It targets servers and workstations that require registered memory with error correction and rank multiplication for high-density configurations. Desktop and laptop systems cannot use these modules.

Upgrading from lower-capacity or non-LRDIMM DDR4

Replacing standard RDIMMs or smaller LRDIMMs with this quad-rank kit increases total addressable memory per channel without exceeding the platform's rank limit. The jump is worthwhile when the workload demands more simultaneous virtual machines, larger in-memory databases, or bigger datasets than the current capacity allows.

Sustained load behaviour with 4Rx4 organisation

The load-reduced buffer reduces electrical loading on the memory bus, helping maintain signal integrity at 2666 MT/s across all four modules during continuous operation. ECC corrects single-bit errors on the fly, preventing silent data corruption during long compute runs. The 1.2V standard voltage keeps power draw predictable under sustained throughput.

Highlights

  • 256 GB total capacity across four 64 GB modules
  • DDR4 2666 MHz speed rated at PC4-21300 bandwidth
  • ECC Load Reduced DIMM corrects errors for server stability
  • 4Rx4 quad-rank organisation increases memory density per slot
  • 2 V standard DDR4 voltage reduces power draw

Specifications

BrandA-Tech
SeriesA-Tech DDR4 Server Memory RAM
ModelA-Tech 64GB 4Rx4 PC4-2666V-L
Capacity256GB (4 x 64GB)
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4 (4DRx4)
Multi-channel KitQuad Channel Kit
ChipsetMajor Brand Chipset
FeaturesMajor Brand Chips

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Questions about this item

Does this 256GB kit use 288-pin DIMM slots?

Yes, the four 64GB modules are DDR4 DIMMs with 288 pins each, designed for server and workstation motherboards that accept DDR4 ECC LRDIMM memory.

What is the correct way to seat the four 64GB modules, and what step do people often miss?

Install the modules in the quad-channel slots specified by the system manual, pressing each 288-pin DIMM down until both retention clips click; the step often missed is verifying the exact slot order for 4Rx4 LRDIMMs in that platform.

When will the 4Rx4 LRDIMM modules need replacement?

The modules carry a lifetime warranty and are built with major-brand chips tested for reliability; replacement is only required if a module fails or the server platform is upgraded beyond DDR4 2666 support.

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