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Green circuit board with gold contacts and black memory chips

A-Tech

A-Tech 4GB DDR4 2666MHz DIMM PC4-21300 CL19 1.2V Desktop RAM

SKU CH-QS5Q-0MY35

4GB DDR4 desktop module running at 2666MHz with CL19 latency and 1.2V operation

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • Tested speed2666
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Recommended forAMD & Intel Compatible

Capacity 4GB

Speed DDR4 2666 (PC4 21300)

  • 4GB capacity adds headroom for everyday multitasking
  • DDR4 2666MHz speed delivers responsive data throughput
  • CL19 latency supports smooth application switching
  • 2V operation reduces system power draw
  • 288-pin UDIMM fits standard desktop memory slots

4GB DDR4 2666MHz DIMM for desktop upgrades

This 4GB DDR4 module runs at 2666MHz with a CL19 latency and standard 1.2V operation. It is an unbuffered non-ECC UDIMM built for desktop systems that accept 288-pin DDR4 memory. The single stick adds capacity for everyday computing and multitasking.

Sustained load behaviour at PC4-21300 speed

At the rated 2666MHz frequency the module maintains stable throughput during extended workloads thanks to JEDEC-standard 1.20V voltage. Unbuffered architecture keeps latency predictable at CL19 while the 288-pin DDR4 interface delivers consistent bandwidth without throttling under continuous use.

Straightforward 288-pin installation steps

Align the notch on the 288-pin DIMM with the motherboard slot key and press firmly until the retention clips click into place. The 1.2V DDR4 standard avoids legacy voltage conflicts, but systems limited to lower speeds will downclock the module automatically. Verify the board supports DDR4 2666 before fitting.

How it compares

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

Price $26.99
Cheaper than about 81% of the 3,647 comparable items (median $90.99).
Total capacity 4 GB
Lower than about 80% of the 3,251 comparable items (median 16 GB).
Price per GB $6.75 per GB
Typical for this category: the median of 3,251 items is $6.75 per GB.

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Desktop Memory RAM
Total capacity4 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
Tested speed2666
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.2 V
Compatibility
Recommended forAMD & Intel Compatible

Other versions of this model

5 more in the same range

Questions about this item

How much heat and power does the 1.2 V DDR4 2666 MHz module draw during all-day use?

The module runs at the standard DDR4 voltage of 1.2 V, so power draw and heat output stay low even under continuous load.

What motherboard slot and memory controller are required for this 288-pin UDIMM to work?

You need a desktop motherboard with a DDR4 DIMM slot and a memory controller that supports 2666 MHz operation.

Will this CL19 2666 MHz stick run stably alongside older DDR4 modules rated at lower speeds?

Yes, the system will clock all modules to the lowest common speed and latency, so the 2666 MHz stick will simply run slower to match.

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