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Green rectangular DDR4 DIMM with black chips on a circuit board

A-Tech

A-Tech 4GB DDR4 2666MHz PC4-21300 DIMM 1Rx16 Desktop Memory

SKU CH-JB0C-FZW6Q

A 4GB DDR4 2666MHz PC4-21300 unbuffered 288-pin DIMM running at 1.2V for desktop upgrades

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • Tested speed2666
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Recommended forAMD & Intel Compatible
  • 4GB capacity adds responsive multitasking headroom for everyday desktop workloads
  • 2666MHz DDR4 speed delivers snappy data throughput at PC4-21300 bandwidth
  • 2V standard voltage keeps power draw low while maintaining stable operation
  • 288-pin DIMM form factor fits mainstream desktop motherboards without adapters
  • Rigorous quality testing ensures dependable, error-free performance over long-term use

4GB DDR4 DIMM for Desktop Upgrade

This 288-pin unbuffered module adds 4GB of DDR4 memory to compatible desktop systems. It runs at the standard 1.20V and is tested at 2666 MT/s. The single-rank 1Rx16 organisation keeps the design straightforward for mainstream boards. Buyers who want more capacity per slot or registered ECC memory should look elsewhere.

DDR4 2666 Standard Limits Speed

The DDR4 2666 (PC4-21300) interface caps the maximum data rate at 2666 MT/s on any platform that supports this JEDEC speed. If the motherboard or processor only runs memory at a lower JEDEC frequency the module will downclock automatically. Systems that require higher JEDEC speeds or overclocked profiles will not reach those rates with this part.

Non-ECC Unbuffered Decides Fit

This module is a non-ECC UDIMM, so it fits only desktop boards that accept unbuffered, non-error-correcting DDR4 DIMMs. Workstations or servers that require registered or ECC DIMMs cannot use it. Verify the board manual calls for non-ECC unbuffered memory before ordering.

How it compares

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

Price $29.99
Cheaper than about 79% 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 $7.50 per GB
Pricier than about 55% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameA-Tech
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

Questions about this item

Should I choose this 4GB DDR4 2666MHz module or a different capacity for my desktop upgrade?

This module provides a single 4GB stick at DDR4 2666MHz; add one if your board has free slots and your workload fits in 4GB, or buy multiple identical sticks to reach the total capacity your system supports.

What does the 2666MHz rating actually deliver once the DIMM is installed?

The module runs at 2666MHz tested frequency with standard 1.2V DDR4 voltage, giving the bandwidth and latency defined by the PC4-21300 specification for everyday desktop tasks.

Does the 288-pin DDR4 DIMM interface limit speed or compatibility in practice?

The 288-pin unbuffered non-ECC DIMM fits standard desktop DDR4 slots and operates at the rated 2666MHz; actual speed will match the highest frequency your motherboard and CPU memory controller support up to that rating.

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