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

A-Tech

A-Tech 16GB DDR4 2666MHz PC4-21300 288-Pin DIMM desktop RAM

SKU CH-HRJ1-KZ1QF

16 GB DDR4 2666 MHz PC4-21300 288-pin unbuffered DIMM desktop memory at 1.2 V

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • Tested speed2666
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Recommended forAMD & Intel Compatible
  • 16GB capacity lets you run more apps at once
  • 2666MHz DDR4 speed keeps data moving quickly
  • 20V standard voltage reduces power draw
  • 288-pin DIMM fits most desktop motherboards
  • Non-ECC unbuffered design suits consumer systems

16GB DDR4 2666MHz DIMM for desktop upgrades

This 16GB DDR4 module runs at 2666MHz and fits a standard 288-pin DIMM slot. It is designed as a direct replacement for Hynix HMAA2GU6AJR8N-VK and HMAA2GU6CJR8N-VK parts. The unbuffered, non-ECC design suits mainstream desktop systems. Builders who need registered or ECC memory should look elsewhere.

Standard 1.20V operation keeps power draw low

At the DDR4 standard voltage of 1.20V the module draws minimal power and generates little heat. No active cooling is required for normal desktop workloads. Silent operation is maintained because the board has no fan or moving parts. Systems with limited airflow will not see a thermal penalty from this stick.

Stable throughput during extended workloads

The memory is tested at 2666MHz to meet PC4-21300 specifications under sustained load. Error-free operation is verified through the manufacturer's quality assurance process. Performance remains consistent during long rendering, compilation or virtualisation sessions. Users who require speeds above 2666MHz will need a different module.

How it compares

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

Price $78.99
Typical for this category: the median of 3,647 items is $90.99.
Total capacity 16 GB
Typical for this category: the median of 3,251 items is 16 GB.
Price per GB $4.94 per GB
Cheaper than about 73% of the 3,251 comparable items (median $6.75 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Total capacity16 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
Tested speed2666
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.2 V
Compatibility
Recommended forAMD & Intel Compatible

Questions about this item

How do I install the 288-pin DIMM and which step do people get wrong?

Align the notch on the module with the slot key, press down firmly until both side clips snap shut, and confirm the motherboard detects 16 GB at 2666 MHz; the step most often missed is not pressing hard enough for the clips to engage fully.

What maintenance or replacement will this 1.2 V DDR4 module need later?

No routine maintenance is required; keep the system dust-free so the DIMM runs at its rated 1.20 V, and replace only if memory errors appear or a capacity upgrade is desired.

What limit appears first when the 16 GB module runs at 2666 MHz under sustained load?

The JEDEC-standard 1.20 V voltage ceiling is reached before thermal throttling, so stability depends on the motherboard maintaining clean power delivery at that voltage.

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