How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
Memory RAM 1x 16GB Apple - iMac Pro 27'' Retina 5K Late 2017 DDR4 2666MHZ ECC REGISTERED DIMM | | RAM MEMORY \ MEMORY FOR APPLE \ APPLE IMAC PRO \ iMac
The New 2017 iMac: Notes & Tidbits on RAM - The Mac Observer
Apple 32GB (2 x 16GB) 2400MHz DDR4 SO-DIMM PC4-19200 Memory Upgrade for Late 2015-2017 iMac 27 inch with Retina 5K Display at Amazon.com