iMac 27-Inch "Core i7" 4.0 (5K, Late 2015) Specs (Retina 5K, Late 2015, BTO/CTO, iMac17,1, A1419, 2834): EveryMac.com
Buy 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
Memory RAM 1x 8GB Apple - iMac 27'' Retina Mid 2015 DDR3 1600MHz SO-DIMM | | | ESUS IT
Buy 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
Apple iMac (Retina 5K 27-inch Mid 2015) Serial Number Lookup - AppleSN.info
Apple iMac Retina 5K Mid 2015 - Core i5 3.3Ghz 27 Inch Apple DDR3 RAM Memory | Kingston
Memory Upgrades for iMac w/ Retina 5K Display Late 2015