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Green rectangular DDR4 DIMM with black chips on both sides, 288 gold edge contacts

A-Tech

A-Tech 128GB DDR4 2666 ECC RDIMM 2S4Rx4 3DS server RAM

SKU CH-FE7A-9WCHH

128 GB DDR4 2666 ECC registered DIMM with 3DS octal-rank density for server and workstation memory expansion

  • Capacity128GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered

Capacity 128GB

  • 128 GB capacity handles large server workloads
  • DDR4 2666 MHz speed moves data quickly
  • CL19 latency supports responsive operation
  • ECC registered design protects data integrity
  • 3DS octal-rank architecture fits dense memory slots

128GB DDR4 2666 ECC RDIMM

This A-Tech module delivers 128GB of DDR4 2666 registered ECC memory in a single 288-pin DIMM. It is built for servers and workstations that require registered DIMMs with error correction. The octal-rank 3DS design fits maximum capacity into one slot. Desktop and laptop systems cannot use this module.

Upgrade from lower-capacity RDIMMs

Replacing smaller registered DIMMs with this 128GB module reduces the number of occupied slots while keeping ECC and registered signalling. The jump is worthwhile when the platform supports 3DS octal-rank modules and the workload demands more memory per channel than dual-rank sticks can provide. Systems limited to dual-rank or non-3DS memory will not accept it.

Capacity and headroom for heavy workloads

The 128GB density handles large virtualisation clusters, in-memory databases and high-thread-count compute jobs with room to spare. At CL19 and 1.20V it runs within standard DDR4 power limits. Workloads that exceed the platform's maximum memory per socket or that require faster than 2666 MT/s will hit a ceiling.

Highlights

  • 128 GB capacity handles large server workloads
  • DDR4 2666 MHz speed moves data quickly
  • CL19 latency supports responsive operation
  • ECC registered design protects data integrity
  • 3DS octal-rank architecture fits dense memory slots

Specifications

BrandA-Tech
SeriesA-Tech DDR4 Server Memory RAM
ModelA-Tech 128GB 2S4Rx4 PC4-2666V-R
Capacity128GB
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 this 288-pin DDR4 RDIMM fit my server's DIMM slots?

The module uses the standard 288-pin DDR4 DIMM form factor and requires a server or workstation motherboard with registered DDR4 slots. It will not fit desktop or laptop SO-DIMM sockets.

What BIOS setting is often missed when installing this octal-rank 3DS module?

After seating the RDIMM firmly until the retention clips click, ensure the memory channel population order in the system manual is followed; many installs fail because the BIOS memory mapping for 3DS ranks is left on default instead of the required 8Rx4 mode.

How can I tell when this 1.20V ECC module should be replaced?

Monitor the system logs for increasing corrected ECC error counts or uncorrectable errors on this specific DIMM; a rising corrected-error trend over weeks signals the 128GB module is degrading and should be swapped before it causes a crash.

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