Factory Original 64GB (2x32GB) 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
iMac 2019 - upgraded w 2 extra ram and the speed dropped to 2400 MHz? | MacRumors Forums
Can I adding Samsung Memory Module DDR4 -… - Apple Community
Amazon.com: A-Tech 8GB RAM for Apple iMac & Mac Mini (2018, 2019 & 2020) | DDR4 2666 MHz SODIMM PC4-21300 / PC4-21333 260-Pin SO-DIMM Memory Upgrade : Electronics
DDR4 | 2017 iMac | 32GB | SO-DIMM | iMac Memory
16Gb Ddr4-2666Mhz Pc4-21300 So-Dimm Memory For Apple 27" 0759170866052 – TeciSoft
16GB Memory Upgrade for 2019-2020 Apple iMac or 2018 Mac mini
Memory Upgrades for 2019-2020 iMac 27-Inch - Up to 128GB
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
4GB DDR4 2666 2667 Mac Memory RAM for APPLE iMac Late 2020 MXWT2LL/A A2115 5K 27 | eBay
Timetec Hynix IC 32GB Kit (2x16GB) DDR4 2666MHz PC4-21300 Unbuffered Non-ECC 1.2V CL19 260 Pin SODIMM Laptop Notebook Computer Memory RAM Module Upgrade S Series (Not For iMac 2019) (32GB KIT(2x16GB)) -
2020 2019 5k 27 Inch Imac 64gb 32gb 16gb 8gb Ddr4 2666 2667 Apple All-in-one Pc Memory Ram - Rams - AliExpress
Adamanta 128GB (4x32GB) Memory Upgrade for 2020 Apple iMac 27" w/Retina 5K Display & 2019 Apple iMac 27" w/Retina 5K Display DDR4 2666Mhz PC4-21300 SODIMM 2Rx8 CL19 1.2v DRAM RAM at Amazon.com