How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
Amazon.com: Apple iMac MRQY2LL/A 27 Inch Early 2019 i5 3.0GHz 8GB Ram - 1TB HHD (Renewed) : Electronics
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
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
How to Install Ram on the 2019 27 inch iMac and which Ram to Buy? - YouTube
27 inch iMac with Retina 5k Display 2019 3.7GHz i5 1TB SSD 32GB RAM | Refurbished | Techable