Apple iMac 27" (5K 2019) Retina i5 3.0GHz, 6 Core - 16GB RAM, 1TB Fusion - Warranty 6 M | i Apple
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
OWC Announces RAM Upgrades for New 27-Inch 5K iMacs - MacRumors