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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

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Tested speed2666
  • Rated voltage1.2 V
  • 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.

How it compares

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

Price $47.99
Cheaper than about 67% of the 3,647 comparable items (median $90.99).
Total capacity 8 GB
Lower than about 60% of the 3,251 comparable items (median 16 GB).
Price per GB $6.00 per GB
Cheaper than about 59% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineCompatible Replacement for Crucial
Model nameCT8G4DFRA266.C8
Total capacity8 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
Tested speed2666
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Recommended forCompatible 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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