OWC Memory Upgrade Kit 8GB and 16GB PC3-12800 DDR3L 1600MHz SO-DIMMs for 21.5-inch iMac Late 2012 - 2013

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£58.49 - £66.00 (Inc. VAT)
£48.74 - £55.00 (Ex. VAT)
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8GB and 16GB OWC Memory Upgrade Kit PC3-12800 DDR3L 1600MHz SO-DIMMs for 21.5-inch iMac late 2012, early and late 2013


  • Memory Built by Mac People for Over 30 Years
  • Memory is the most cost-effective DIY upgrade you can make to your Mac.
  • Unleash the true speed and performance of your system and applications.
  • Experience increased efficiency and productivity. Open more apps and files, all at the same time.
  • Warranty Safe Upgrade
  • Free step-by-step installation videos
  • 30-Day Money Back Guarantee

Professional Installation Highly Recommended

While this upgrade kit itself should not void your warranty, the installation process is very complex, and thus it is recommended to be performed by a trained professional. To watch an OWC Certified Technician remove the screen and other components to perform the memory upgrade watch videos from the Videos tab.

Improve System Speed
OWC Memory is the most cost effective and simple DIY upgrade you can install to unleash your Mac's full potential and speed up overall responsiveness.

More Apps. More Files
Become a multi-tasking maven when you upgrade your Mac with OWC Memory. Open more apps. Open larger files. Plus, work with multiple files all at the same time.

Save $$S vs Factory
Save BIG vs factory Mac memory options. Plus, select among options not offered by the factory. OWC makes it easy to find the perfect upgrade to fit your needs.

Lab Tested Compatibility
We test every OWC memory module at our in-house lab so you can upgrade with the confidence that your memory is 100% compatible with your Mac.

Lifetime Warranty
We build OWC Memory upgrades to meet or exceed Apple's specs and provide years of worry-free service.

Step-by-Step Videos
OWC detailed install videos guide your upgrade from start to finish. We provide all the steps to make your OWC Memory upgrade DIY easy. (watch in the Video tab)

(2) PC12800 1600MHz DDR3L SO-DIMM memory modules (4GB or 8GB, depends of the option chosen)
(1) iMac opening tool
(1) Suction cups for safe screen removal
(1) Torx 10S Driver
(1) Torx 8S Driver
(1) Foam adhesive for proper glass and display resealing
(1) Microfiber screen cloth
OWC Memory Lifetime Limited Warranty 

Total Capacity 8GB (4GB x 2) or 16GB (8GB x 2)
RoHS Compliant Yes
Data Rate 1600MT/s
I/O Clock Speed 800MHz
Registration Non-registered
Error Correction Non-ECC
Cycle Time 1.25 ns
Form Factor SO-DIMM
Type of Memory DDR3L
PC Speed 12800
Timing CAS = 11.0
Full Parameters: 11-11-11-14
Bandwidth 12.8GB/s
JEDEC Fully compliant with JEDEC specifications
Voltage 1.35 Volts
Pin Count 204-pin
Printed Circuit Board Type Low-noise 8-layer PCB
Ambient Temperature Operating: 32°F to 185°F (0°C to 85°C)


Late 2012 | Model ID: iMac13,1 - A1418 - EMC2544
Early 2013 | Model ID: iMac13,1 - A1418 - EMC2545
Late 2013 | Model ID: iMac14,1 - A1418 - EMC2638
Late 2013 | Model ID: iMac14,3 - A1418 - EMC2742