How to Upgrade/Install Memory in a 21.5-inch iMac (Mid 2017) iMac18,1 iMac18,2 - YouTube
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Memory Upgrades for iMac w/ Retina 5K Display Late 2015
Surprise! The iMac Pro has Upgradable RAM and SSD - The Mac Observer
Install memory in an iMac - Apple Support
How To: Upgrade 2017 5k iMac RAM to 64GB & Saved $840 | 2018 - YouTube
How to Upgrade iMac RAM: 2012-2022: EveryMac.com
A-Tech 64GB (4x16GB) RAM for Apple iMac 2017 27 inch Retina 5K | DDR4 2400MHz SODIMM PC4-19200 2Rx8 1.2V 260-Pin SO-DIMM Memory Upgrade Kit at Amazon.com
Amazon.com: OWC 32GB (2 x 16GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S32P) : Everything Else