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
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
Can you upgrade the RAM in the 27-inch iMac? | iMore
256.0GB(4 x 64GB 2666MHZ DDR4 LRDIMM PC4-21300) OWC Memory Upgrade Kit for iMac Pro (2017 - Current) - ynzal.com
Install memory in an iMac - Apple Support
How do you install RAM in your iMac? - Coolblue - anything for a smile
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac