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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 DIMM 2Rx8 Desktop Memory

SKU CH-YD7D-XYX1Y

A 16GB DDR4 2666MHz DIMM module that replaces Samsung M378A2K43BB1-CTD, M378A2K43CB1-CTD and M378A2K43DB1-CTD parts for desktop upgrades

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • Tested speed2666
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Recommended forAMD & Intel Compatible
  • 16GB DDR4 2666MHz boosts multitasking speed and system responsiveness
  • Single 16GB module uses 288-pin DIMM form factor for standard desktop slots
  • 20V DDR4 standard voltage reduces power draw and heat output
  • Non-ECC unbuffered design works with AMD and Intel consumer platforms
  • Replaces Samsung M378A2K43BB1-CTD M378A2K43CB1-CTD M378A2K43DB1-CTD modules directly

16 GB DDR4 DIMM for desktop upgrades

This 16 GB DDR4 module runs at 2666 MHz (PC4-21300) on standard 1.20 V. It is an unbuffered, non-ECC DIMM built to replace Samsung M378A2K43BB1-CTD, M378A2K43CB1-CTD and M378A2K43DB1-CTD parts in desktop systems.

Build fit and freed resources

The 288-pin DIMM plugs into any desktop board that accepts DDR4 UDIMMs, leaving other slots open for additional modules. Adding this single stick increases total memory capacity so the operating system can keep more applications and data in RAM instead of paging to storage.

Thermals noise and power

Operating at the DDR4 standard voltage of 1.20 V keeps power draw low and heat output minimal. The module has no onboard fan, so it adds no acoustic noise to the build. Typical desktop airflow is sufficient to maintain stable temperatures during normal workloads.

How it compares

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

Price $81.99
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 $5.12 per GB
Cheaper than about 71% 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

Will the 2666MHz speed hold under continuous heavy workloads?

The module is rated for DDR4 2666 (PC4-21300) at 1.20V and runs unbuffered, so the rated frequency is maintained under sustained load.

How much heat and noise does this 16GB stick produce during all-day operation?

Standard DDR4 1.2V unbuffered DIMMs run passively without fans; they add minimal heat and zero noise to a desktop chassis.

What motherboard slot is required for this 288-pin DIMM to work?

A DDR4 DIMM slot (288-pin) on a desktop motherboard that supports non-ECC unbuffered memory is needed.

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