APPLE iMac 5K 27in (2019) - Intel i5 8GB RAM 1TB Fusion Drive Radeon Pro 570X 4GB - 5K Ultra HD display
The 27-inch iMac 2019's RAM may be upgraded to 128GB - NotebookCheck.net News
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
Install memory in an iMac - Apple Support
How to UPGRADE RAM in the (Mid 2017) 5K iMac & save $$$! - YouTube
Factory Original 64GB (2x32GB) Memory Upgrade for 2020 & 2019 Apple iMac 27" w/Retina 5K Display & 2018 Apple Mac Mini DDR4 2666Mhz PC4-21300 SODIMM 2Rx8 CL19 1.2v RAM Adamanta at Amazon.com
Can you upgrade the RAM in the 27-inch iMac? | iMore