Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
2020 5K iMac RAM Upgrade Guide - Save $2100 on 128GB! - YouTube
How to Upgrade iMac RAM: 2012-2022: EveryMac.com
How to Improve Multitasking with an iMac Ram Upgrade?