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

SAMSUNG

SAMSUNG M378A1K43CB2-CTD_UA 8GB DDR4 DIMM 2666MHz CL19 1.2V 288-pin desktop memory

SKU CH-9M4W-4ASCB MPN M378A1K43CB2-CTD_UA

An 8GB DDR4 desktop DIMM running at 2666MHz with CL19 latency and 1.2V operation

  • 8GB capacity for everyday multitasking
  • DDR4 at 2666MHz for responsive performance
  • CL19 latency for stable operation
  • 2V low voltage reduces power draw
  • 288-pin DIMM fits standard desktop slots

8 GB DDR4 DIMM 2666 MHz CL19

This Samsung module adds 8 GB of DDR4 memory to a desktop system. It runs at 2666 MHz with CL19 latency at 1.2 V on a standard 288‑pin DIMM. The stick is unbuffered, non‑ECC and single rank 1Rx8, matching the PC4‑21300 bus specification.

Suitable builds and limits

It fits PCs that accept DDR4 DIMMs at 2666 MHz and do not require ECC or registered modules. Builders needing ECC error correction, registered memory, higher capacities per stick or speeds above 2666 MHz should look elsewhere.

Deciding specification: 2666 MHz DDR4

The single figure that decides compatibility is the 2666 MHz DDR4 rating. If the motherboard or CPU memory controller does not support this exact speed, the module will not run at its rated frequency.

How it compares

Measured against everything we stock in Cable Locks & Laptop Extras, at today’s prices. Recalculated every night.

Price $51.99
Pricier than about 82% of the 8,808 comparable items (median $16.99).

Specifications

No published specifications for this item yet.

Questions about this item

Will the 1Rx8 rank layout limit future upgrades if I add another stick?

The module uses a single 1Rx8 rank, so it occupies one rank slot on the memory controller; most consumer boards support two ranks per channel, leaving room for a second stick.

What speed ceiling will I hit first when running this CL19 2666MHz module continuously?

The JEDEC-rated 2666MHz speed and CL19 latency are the fixed operating points; sustained loads will not push the module beyond these specifications.

How much heat or power draw should I expect from the 1.2V DIMM during all-day operation?

At the standard 1.2V DDR4 voltage the module draws minimal power and produces little heat, requiring only normal case airflow for cooling.

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