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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

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered

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.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 95% of the 6,523 comparable items (median $188.99).
Total capacity 4 GB
Lower than about 95% of the 6,064 comparable items (median 32 GB).
Price per GB $5.00 per GB
Cheaper than about 73% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Server Memory RAM
Model nameA-Tech 4 GB 1Rx8 PC4-2666 V-R
Part numberAT4G1D4D2666RS8N12 V
Total capacity4 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Kit configurationSingle Module
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

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.

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