Timetec 32GB KIT(2x16GB) Compatible for Apple DDR4 2666MHz / 2667MHz for Mid 2020 iMac (20,1/20,2) / Mid 2019 iMac (19,1) 27-inch w/Retina 5K, Late 2018 Mac Mini (8,1) PC4-21333 /PC4-21300 MAC RAM at Amazon.com
Amazon.com: V-Color 32GB(2x16GB) 2666MHz ddr4 Compatible for iMac Retina 5K, 27-inch, 2019 and iMac Retina 5K, 27-inch, 2020 Non ecc SODIMM Mac Memory Ram Upgrade pc4-21300 CL19 260-pin 1.2V (TN416G26D819K-VC) : Everything
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
DDR4 | 2019/2020 iMac | SO-DIMM | iMac Memory
How to Install Ram on the 2019 27 inch iMac and which Ram to Buy? - YouTube
iMac 2019 - upgraded w 2 extra ram and the speed dropped to 2400 MHz? | MacRumors Forums
DDR4 2666MHZ PC4-21300 for Apple iMac Pro 2017 1,1
32GB PC4-21300 RAM for Apple iMac 2020 - 27 Inch Retina 5K MXWU2LL/A - MXWU2xx/A Memory Upgrade Module — A-Tech Memory
DDR4 | 2019/2020 iMac | SO-DIMM | iMac Memory
64GB Memory Upgrade for 2019-2020 Apple iMac (27-inch)
Apple iMac review: A 27-inch work-from-home beast with a killer webcam - CNET