New For Imac 27" Retina 5k 2019 Year A2115 4gb 8gb 16gb 32gb 64gb 128gb Ram Pc4-2666v 2667mhz Ddr4 Memory Upgrade Kit Emc 3194 - Laptop Repair Components - AliExpress
Adamanta 16GB (1x16GB) 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