Apple 21.5" iMac with Retina 4K Display (Early 2019) MRT32LL/A
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
Apple iMac 21.5-inch (2019) review | TechRadar
Apple iMac 27-inch (2019) review: Apple iMac 2019 is a millennial trapped in the body of a baby boomer - CNET
Factory Original 32GB (2x16GB) 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
Apple iMac (27-inch, 2019) | TechRadar
Identify your iMac model - Apple Support
Amazon.com: Apple iMac 27" with Retina 5K Display, 3.3Ghz 6-Core Intel i5, 8GB RAM, 512GB SSD, AMD Radeon Pro 5300 4GB, Mid 2020 : Electronics