Apple iMac Pro Desktop - 8-Core Intel Xeon W 3.2GHz, 32GB DDR4 RAM, 27 Retina 5K 5120x2880, 4TB SSD, 8GB Radeon Pro Vega 56, 4x Thunderbolt 3, 802.11ac, BT, macOS Mojave -
Timetec 32GB KIT(4x8GB) Compatible for Apple DDR3L 1600MHz PC3L-12800 CL11 for iMac (Mid 2011, Late 2012, Late 2013, Late 2014 Retina 5K, Mid 2015 Retina 5K) SODIMM Memory Module MAC RAM Upgrade at Amazon.com
Apple Memory Module 32GB DDR4 2400MHz SO-DIMM (2x16GB) - Apple
32GB 2X16GB NEMIX RAM Memory for Apple iMac 2017 27" Retina 5K - Newegg.com
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac