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
Install memory in an iMac - Apple Support
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Install memory in an iMac - Apple Support
How to upgrade RAM in the (Mid 2017) 5K iMac and save up to ~$900 [Video] - 9to5Mac
Upgrade your iMac 27'' 2017 RAM with MrMemory review - Wim Arys
How to upgrade the RAM on the 27-Inch iMac (2020) | AppleInsider
iMac, 2021, 24-inch, Apple M1, 256GB SSD, 8GB RAM, Blue
Memory Upgrades for iMac w/ Retina 5K Display Late 2015
Don't Upgrade The RAM In Your New Apple iMac, Do This Instead