A-Tech 128GB Kit (4x32GB) RAM for Apple iMac 2019 & 2020 27 inch Retina 5K | DDR4 2666 MHz SODIMM PC4-21300 / PC4-21333 260-Pin SO-DIMM Max Memory Upgrade
30% cheaper per GB than the average 128GB DDR4 kit we track.
Specification
| Capacity | 128GB (4x32GB) |
| Generation | DDR4 |
| Speed | 2666MHz |
| Form factor | SO-DIMM |
| ECC | Non-ECC |
| Buffered | Unbuffered |
| For | Mac |
| Brand | A-Tech |
| ASIN | B07TVF8JY2 |
Price history
Typical price (median) 90-day £755.51 12-month £767.60 12-month low £367.26 All-time low £271.92 (2025-05-05)
Not really a deal Today’s price is 14% above this kit’s typical price for the past year, and it has been cheaper than this for 16% of that year (last on 21 Nov 2025). Why medians, not averages ›
30-day avg £749.9990-day avg £755.70180-day avg £781.06 (averages are pulled up by price spikes; the medians above are the better guide)
Cheaper per GB in the same spec
Same generation, capacity and form factor as this kit, ranked by £/GB. See all ›
| £/GB | Price | Capacity | Manufacturer | For | Type | Form Factor | ECC / Buffered | Description | |
|---|---|---|---|---|---|---|---|---|---|
 | £6.16best £/GB | £788.65 | 128GB (4x32GB) | NEMIX RAM | Mac | DDR4 | SO-DIMM 2666MHz | Non-ECCUnbuffered | |
 | £10.18 | £1,302.43★▼ 46% | 128GB (4x32GB) | OWC | Mac | DDR4 | SO-DIMM 3200MHz | Non-ECCUnbuffered | |
 | £10.59 | £1,355.45▼ 27% | 128GB (4x32GB) | OWC | Mac | DDR4 | SO-DIMM 2400MHz | Non-ECCUnbuffered | |
 | £15.28 | £1,955.58 | 128GB (4x32GB) | OWC | Mac | DDR4 | SO-DIMM 3200MHz | ECCUnbuffered | |
 | £17.32 | £2,217.44 | 128GB (8x16GB) | OWC | Mac | DDR4 | SO-DIMM 3200MHz | ECCUnbuffered |
About this kit
- 128GB Kit ( 4 x 32GB Modules ) | DDR4 2666 MHz / 2667 MHz ( PC4-21300 / PC4-2666V ) | DDR4 SO-DIMM ( 260-Pin ) | Non-ECC Unbuffered | 2Rx8 - Dual Rank x8 | 1.2V - DDR4 Standard Voltage
- Compatible with iMac 2020 (27-inch Retina 5K) & 2019 (27-inch Retina 5K) - Model IDs: iMac20,1 iMac20,2 iMac19,1 - 3.0GHz i5, 3.1GHz i5, 3.3GHz i5, 3.7GHz i5, 3.2GHz i7, 3.8GHz i7, 3.6GHz i9
- Maximizes the performance of your system by speeding up loading times, boosting responsiveness, and improving the ability to support greater workloads
- All modules undergo quality assurance testing to ensure dependable and reliable performance
- A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase
An A-Tech Memory (RAM) upgrade is an easy, quick way to boost your system's performance by speeding up loading times, improving system responsiveness, and increasing your system's ability to handle higher workloads. Take on more and multitask with ease with a simple and affordable A-Tech Memory upgrade! Compatible with the Apple Mac Systems: 2020 iMac (27-inch, Retina 5K) - Model ID: iMac20,1 iMac20,2 2019 iMac (27-inch, Retina 5K) - Model ID: iMac19,1 Memory Specs Memory Size: 128 GB Kit ( 4 x 32 GB Modules ) Memory Type: DDR4 Form Factor: SO-DIMM ( 260 Pin ) Speed: DDR4 2666 / 2667 MHz ( PC4-21300 / PC4-2666V ) ECC Type: Non-ECC Unbuffered Rank: 2Rx8 ( Dual Rank x8 ) Voltage: 1.2V Ensured Reliability All A-Tech Memory products are rigorously tested to ensure that your memory meets our stringent quality and performance standards. Lifetime Warranty Purchase with confidence knowing that all A-Tech orders are backed with our Lifetime Warranty. US Based Technical Support Need help? Have questions? Our 5 star United States based support team is here to help before, during, and after your purchase to make sure you are completely satisfied with your A-Tech Memory!
Read moreAs an Amazon Associate we earn from qualifying purchases. Price and availability shown are as of the last update and may change on Amazon.