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Green rectangular circuit board with 288 gold pins and black memory chips

A-Tech

A-Tech 4GB DDR4 2666MHz PC4-21300 288-Pin DIMM Desktop RAM

SKU CH-9GKJ-623ZB

4GB DDR4 2666MHz desktop DIMM module running at 1.2V for broad AMD and Intel compatibility

  • Capacity4GB
  • SpeedDDR4 2666 (PC4 21300)
  • Tested Frequency2666
  • Voltage1.20V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • 4GB capacity expands multitasking headroom for everyday workloads
  • DDR4 2666 MHz speed matches PC4-21300 bandwidth rating
  • 20V standard voltage keeps power draw low
  • 288-pin DIMM form factor fits standard desktop slots
  • Tested replacement for Samsung M378A5244BB0-CTD modules

4GB DDR4 2666MHz desktop memory

This 4GB DDR4 module runs at 2666MHz with a PC4-21300 rating and standard 1.20V operation. It is an unbuffered non-ECC DIMM built for desktop computers. The single 1Rx16 stick fits 288-pin slots and is tested for AMD and Intel platform compatibility.

Replaces Samsung M378A5244BB0-CTD modules

This stick is a direct replacement for Samsung part numbers M378A5244BB0-CTD, M378A5244CB0-CTD and M378A5244CBO-CTD. The upgrade is worth it when your system needs additional capacity or a matching stick to complete a dual-channel pair. Each module undergoes quality assurance testing for dependable performance.

Check your motherboard DDR4 slot count

Verify that your board accepts 288-pin unbuffered non-ECC DDR4 DIMMs and supports 2666MHz speed at 1.20V. Confirm the total memory limit per slot and overall so the 4GB module does not exceed it. Ensure an empty slot is available for installation.

Highlights

  • 4GB capacity expands multitasking headroom for everyday workloads
  • DDR4 2666 MHz speed matches PC4-21300 bandwidth rating
  • 20V standard voltage keeps power draw low
  • 288-pin DIMM form factor fits standard desktop slots
  • Tested replacement for Samsung M378A5244BB0-CTD modules

Specifications

BrandA-Tech
Capacity4GB
SpeedDDR4 2666 (PC4 21300)
Tested Frequency2666
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
Recommend UseAMD & Intel Compatible

Questions about this item

Will this 4 GB DDR4 2666 MHz module fit my desktop's 288-pin DIMM slots?

Yes — the stick is a standard 288-pin unbuffered DIMM that installs in any desktop DDR4 slot keyed for 2666 MHz operation.

Can I add this stick alongside my existing DDR4 memory without changing BIOS settings?

It runs at the standard 1.2 V JEDEC voltage, so most motherboards will auto-detect the correct frequency and timings without manual adjustment.

Is this module a direct replacement for Samsung part numbers M378A5244BB0-CTD, M378A5244CB0-CTD and M378A5244CBO-CTD?

The specifications match — 4 GB, 1Rx16 organisation, DDR4 2666, PC4-21300, non-ECC unbuffered — making it a compatible substitute for those Samsung modules.

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