Can you upgrade the RAM in the 27-inch iMac? | iMore
Timetec 8GB Compatible for Apple Late 2015 iMac (27-inch w/Retina 5K Display) DDR3L 1867MHz / 1866MHz PC3L-14900 2Rx8 CL13 1.35V 204 Pin SODIMM Memory Module MAC RAM Upgrade for iMac 17,1 at Amazon.com
5K iMac (Late 2015) RAM Upgrade - YouTube
32GB (2 X 16GB) Kit Memory for Apple iMac Late 2015 27-inch 1867MHz DDR3 SO-DIMM at Amazon.com
Upgrade RAM on Apple Retina iMac 5K (Late 2015) / How To install memory - YouTube
iMac RAM Upgrade 8GB-32GB (Late 2015) - YouTube
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
Timetec 16GB KIT(2x8GB) Compatible for Apple Late 2015 iMac (27-inch w/Retina 5K Display) DDR3L 1867MHz / 1866MHz PC3L-14900 2Rx8 CL13 1.35V 204 Pin SODIMM Memory Module MAC RAM Upgrade for iMac 17,1