Adamanta 16GB (2x8GB) 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 1Rx8 CL19 1.2v DRAM
Install memory in an iMac - Apple Support (CA)
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
27" APPLE iMAC 3.6GHz i9 8-CORE 5K 2TB SSD 64GB RAM RADEON PRO VEGA 48 8GB | eBay
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac