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Green bare circuit board with black memory chips and gold edge connectors

A-Tech

A-Tech 8GB DDR4 2666MHz CL19 1.2V Desktop RAM for Crucial CT8G4DFRA266.C8

SKU CH-ESF4-SEVF5

An 8 GB DDR4 desktop module running at 2666 MHz with CL19 timing and 1.20 V for Crucial CT8G4DFRA266.C8 systems

  • Capacity8GB
  • SpeedDDR4 2666 (PC4 21300)
  • Tested Frequency2666
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCNo
  • 8 GB capacity lets you run more applications at once
  • DDR4 2666 MHz speed moves data quickly through the system
  • CL19 latency keeps response times tight
  • 2 V operation reduces power draw and heat
  • 288-pin DIMM fits standard desktop memory slots

Capacity and Form Factor

This 8 GB DDR4 module uses a 288-pin DIMM layout and runs at 2666 MHz with a CAS latency of 19. It is built as an unbuffered, non-ECC stick operating at the standard 1.2 V, making it a direct drop-in for desktop boards that accept PC4-21300 memory.

Everyday Workloads

The single 8 GB rank provides comfortable headroom for office suites, web browsing with many tabs and light creative tasks such as photo editing. When multiple heavy applications or virtual machines run together the capacity ceiling is reached and the system will begin paging to storage.

Matching the Target Part

The module is validated as a compatible replacement for the Crucial CT8G4DFRA266.C8 part number, so it will slot into any desktop that officially supports that specific Crucial SKU without further configuration.

Highlights

  • 8 GB capacity lets you run more applications at once
  • DDR4 2666 MHz speed moves data quickly through the system
  • CL19 latency keeps response times tight
  • 2 V operation reduces power draw and heat
  • 288-pin DIMM fits standard desktop memory slots

Specifications

BrandA-Tech
SeriesCompatible Replacement for Crucial
ModelCT8G4DFRA266.C8
Capacity8GB
SpeedDDR4 2666 (PC4 21300)
Tested Frequency2666
CAS LatencyCL19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
ChipsetMajor Brand Chipset
Heat SpreaderNo
FeaturesCT8G4DFRA266.C8
Recommend UseCompatible Replacement for Crucial CT8G4DFRA266.C8

Questions about this item

Will this DDR4 2666MHz CL19 1.2V module run alongside my existing DDR4 2666MHz sticks?

Yes, it will run at the shared 2666MHz speed and 1.2V voltage; both kits must be unbuffered non‑ECC DIMMs for the system to train correctly.

How can I confirm the module is running at 2666MHz with CL19 timings after installation?

Open Task Manager > Performance > Memory or run CPU‑Z; the SPD tab should show 2666 MT/s and the timings table should list CL19‑19‑19 at 1.20V.

What comes in the box and do I need any extra parts to install this 288‑pin DIMM?

The box contains the single 8GB DDR4 288‑pin UDIMM only; no screws, cables or tools are required — just an empty motherboard slot.

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