La RAM n'est plus soudée sur les iMac 21,5 pouces | MacGeneration
How To: Upgrade 2017 5k iMac RAM to 64GB & Saved $840 | 2018 - YouTube
Buying a New iMac? Here's the Info on the 2017 iMac RAM Upgrades
Teardown of new 21.5-inch iMac surprisingly reveals user-upgradable RAM, modular CPU - 9to5Mac
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
How to Upgrade iMac RAM: 2012-2022: EveryMac.com
Upgrade your iMac 27'' 2017 RAM with MrMemory review - Wim Arys