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Eight green DDR4 RDIMM sticks in static bags

A-Tech

A-Tech 1TB (8x128GB) DDR4 2666 ECC RDIMM 2S4Rx4 Server RAM

SKU CH-YFTJ-QQFN2

Eight 128 GB DDR4 2666 ECC RDIMM modules provide 1 TB of registered server memory at CL19 and 1.2 V

  • Capacity1TB (8 x 128GB)
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered

Capacity 1TB (8 x 128GB)

  • 1TB capacity across eight 128GB modules
  • DDR4 2666 MHz speed for fast data throughput
  • ECC registered design corrects errors automatically
  • 2S4Rx4 3DS/TSV architecture enables high-density scaling
  • 20V standard voltage reduces power draw

1TB DDR4 ECC RDIMM Kit

This 1 TB kit contains eight 128 GB DDR4 2666 MHz registered DIMMs with ECC. Each module uses a 2S4Rx4 octal-rank 3DS layout on a 288-pin form factor. The memory is built for servers and workstations that require registered ECC DDR4 modules.

Upgrade From Lower-Capacity DDR4 RDIMMs

The jump makes sense when a DDR4 server platform supports 128 GB modules per slot and the workload needs more memory channels populated. Moving from smaller RDIMMs to this 1 TB kit increases total capacity without changing voltage or speed.

Suits DDR4 Servers Needing Maximum Capacity

It fits administrators expanding memory on qualified DDR4 server or workstation boards that accept 288-pin registered ECC modules at 2666 MHz. Buyers whose systems only support unbuffered DDR4, a different DDR generation, or lower maximum module density should look elsewhere.

Highlights

  • 1TB capacity across eight 128GB modules
  • DDR4 2666 MHz speed for fast data throughput
  • ECC registered design corrects errors automatically
  • 2S4Rx4 3DS/TSV architecture enables high-density scaling
  • 20V standard voltage reduces power draw

Specifications

BrandA-Tech
SeriesA-Tech DDR4 Server Memory RAM
ModelA-Tech 128GB 2S4Rx4 PC4-2666V-R
Capacity1TB (8 x 128GB)
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank2S4Rx4 (8Rx4 3DS/TSV)
ChipsetMajor Brand Chipset
FeaturesMajor Brand Chips

Other versions of this model

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Questions about this item

Will these 288-pin DDR4 RDIMMs fit in a standard server DIMM slot?

Yes, each module uses the 288-pin DDR4 RDIMM form factor designed for server and workstation DIMM slots only; they are not compatible with desktop or laptop memory sockets.

What is the correct seating procedure for the 8Rx4 3DS registered modules?

Align the notch on each 288-pin module with the slot key, press straight down until both side clips click shut, and follow the motherboard manual for channel population order; the most common error is stopping before the clips fully engage.

When should the 1.2 V DDR4 2666 CL19 kit be replaced or re-validated?

Run a full memory diagnostic after any firmware update or hardware change; otherwise, ECC RDIMMs typically run for the life of the server and only need replacement if correctable error counts rise sharply or a module fails POST.

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