We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green circuit board DDR4 RDIMM module with black memory chips, gold edge connectors, no heat spreader

A-Tech

A-Tech 4GB DDR4 2666 ECC RDIMM 1Rx8 CL19 1.2V server RAM

SKU CH-QA4Y-GTSHQ

4GB DDR4 2666 ECC RDIMM module with CL19 latency and 1.2V operation for servers

  • Capacity4GB
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes

Capacity 4GB

  • 4GB capacity adds memory headroom for virtualised workloads
  • DDR4 2666 speed moves data at PC4-21300 rates
  • ECC RDIMM detects and corrects single-bit errors automatically
  • Registered buffer reduces electrical load on the memory controller
  • Single-rank 1Rx8 layout keeps signal timing tight

4 GB DDR4 2666 ECC RDIMM for servers

This 4 GB module is a registered DDR4 DIMM with error-correcting code and a single-rank x8 layout. It runs at 2666 MHz with CL19 latency and standard 1.2 V power. The 288-pin form factor fits server and workstation platforms that require ECC RDIMM memory. Desktop and laptop systems are not supported.

Sustained workload behaviour

Error correction detects and corrects single-bit errors during continuous operation, helping data integrity under long-running server loads. Registered buffering reduces electrical load on the memory controller, allowing stable timing at the rated 2666 MHz speed across populated channels. The single-rank organisation keeps latency predictable for consistent throughput.

Upgrade context

This module replaces a missing or failed DDR4 ECC RDIMM in a compatible server or workstation. The capacity increase is worthwhile when the system reports memory pressure or when adding modules to fill empty slots for multi-channel bandwidth. Buyers who need non-ECC memory, unbuffered DIMMs or a different DDR generation cannot use this product.

Highlights

  • 4GB capacity adds memory headroom for virtualised workloads
  • DDR4 2666 speed moves data at PC4-21300 rates
  • ECC RDIMM detects and corrects single-bit errors automatically
  • Registered buffer reduces electrical load on the memory controller
  • Single-rank 1Rx8 layout keeps signal timing tight

Specifications

BrandA-Tech
SeriesA-Tech DDR4 Server Memory RAM
ModelA-Tech 4GB 1Rx8 PC4-2666V-R
Part NumberAT4G1D4D2666RS8N12V
Capacity4GB
Type288-Pin DDR4 SDRAM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx8
Multi-channel KitSingle Module
ChipsetMajor Brand Chipset
Heat SpreaderNo
FeaturesMajor Brand Chips / Error Correcting Technology for Server Systems

Other versions of this model

1 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does this 1.2 V DDR4 2666 module draw more power or run hotter when the server runs continuously?

It operates at the standard 1.2 V for DDR4, so power draw and heat stay at normal registered DIMM levels during all-day workloads.

What motherboard slot and memory standard must my server already support for this 288-pin ECC RDIMM to function?

The board must provide a DDR4 288-pin registered DIMM slot that accepts ECC memory; desktop or laptop slots will not work.

Can I add this CL19 1Rx8 stick to a channel that already has a different-rank registered DDR4 module?

Mixing ranks in the same channel is not recommended; follow the system manual for supported rank-per-channel configurations.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.