Memory Upgrades for 2019-2020 iMac 27-Inch - Up to 128GB
Apple iMac 27-inch (2019) review: Apple iMac 2019 is a millennial trapped in the body of a baby boomer - CNET
Apple iMac 27 Inch 5K 3.0 GHz i5 512GB SSD 64GB 2667MHz RAM 4GB GFX 20 – Quality Macs
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
Adamanta 64GB (2x32GB) Memory Upgrade for 2020 Apple iMac 27" w/Retina 5K Display, 2019 Apple iMac 27" w/Retina 5K Display, 2018 Apple Mac Mini DDR4 2666Mhz PC4-21300 SODIMM 2Rx8 CL19 1.2v DRAM
Can you upgrade the RAM in the 27-inch iMac? | iMore