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› OFFTEK 4GB Replacement Memory RAM Upgrade for Apple iMac Retina 5K 27-inch Mid 2020-4.8GHz Core i5 (DDR4-21300 (PC4-2666)) Desktop Memory
OFFTEK 4GB Replacement Memory RAM Upgrade for Apple iMac Retina 5K 27-inch Mid 2020-4.8GHz Core i5 (DDR4-21300 (PC4-2666)) Desktop Memory
£29.03 £7.26/GB
17% cheaper per GB than the average 4GB DDR4 kit we track.
★ All-time low Mac DDR4
Buy on Amazon.co.uk
Specification
| Capacity | 4GB |
| Generation | DDR4 |
| Speed | 21300MHz |
| Form factor | DIMM |
| For | Mac |
| Brand | OFFTEK |
| ASIN | B0C5453YTR |
Price history
30-day avg £29.0390-day avg £30.34180-day avg £33.59 All-time low £29.00 (2026-01-05)
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 | |
|---|---|---|---|---|---|---|---|---|---|
 | £7.24best £/GB | £28.97 | 4GB | OFFTEK | Desktop | DDR4 | DIMM 19200MHz | - | |
| £7.24 | £28.97 | 4GB | OFFTEK | Desktop | DDR4 | DIMM 19200MHz | - | |
| £7.24 | £28.97 | 4GB | OFFTEK | Desktop | DDR4 | DIMM 19200MHz | - | |
| £7.24 | £28.97★ | 4GB | OFFTEK | Desktop | DDR4 | DIMM 19200MHz | - | |
| £7.24 | £28.97 | 4GB | OFFTEK | Desktop | DDR4 | DIMM 19200MHz | - | |
| £7.24 | £28.97 | 4GB | OFFTEK | Desktop | DDR4 | DIMM 19200MHz | - |
About this kit
- Boost Your System’s Performance: Increase available memory for smoother multitasking, improved responsiveness and better performance when running memory-intensive applications.
- Matched Specifically to Your Machine: OFFTEK selects the correct memory configuration for the computer shown in this listing, removing the uncertainty from choosing a compatible upgrade.
- We Do the Technical Checking for You: There is no need to compare memory speeds, voltages, form factors or other technical details, as the upgrade has been matched to the machine’s supported requirements.
- Extend the Life of Your Computer: Increasing the available memory can help your existing machine remain productive for longer, offering a cost-effective alternative to replacing the complete system.
- Quick and Straightforward Upgrade: Memory is simple to install and requires no software installation; shut down and disconnect the machine before fitting and follow the manufacturer’s instructions.
- Tested for Dependable Performance: Every OFFTEK memory module is checked and tested at component and module level to support stable, reliable operation in everyday use.
- Matched Memory, Without the Guesswork: Receive the memory configuration selected on this listing, chosen specifically for the computer model shown to make upgrading simple and reassuring.
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