A-Tech 32GB Kit (4x8GB) RAM for Apple iMac (Late 2012, Late 2013, Late 2014, Mid 2015) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Max Memory Upgrade at Amazon.com
Install memory in an iMac - Apple Support
Apple upgrades its 27" iMac with 10-gen Intel CPUs, new AMD GPUs and doubles RAM capacity: Digital Photography Review
How to Upgrade iMac RAM (21.5" and 27" Aluminum): EveryMac.com
Install memory in an iMac - Apple Support
2017 21.5-inch 4K iMac memory upgrade kit includes 32GB of RAM, tools to take it apart | AppleInsider
Memory Upgrades for 2019-2020 iMac 27-Inch - Up to 128GB
OWC Confirms 64GB of RAM in Apple 27" iMac 2017
How To Upgrade RAM in a Mac | Macworld
Apple 27" iMac with Retina 5K Display (Mid 2020) MXWV2LL/A B&H
The New 2017 iMac: Notes & Tidbits on RAM - The Mac Observer
How to Install RAM in an iMac: 5 Steps (with Pictures) - wikiHow