32GB, 240-pin DIMM, DDR3 PC3-10600 Memory Module at Amazon.com
Kingston Technology 32GB (1 X 32GB) 1066MHz DDR3 240-Pin Quad Rank Registered ECC Low Voltage DIMM for IBM Servers (PC3 8500) KTM-SX310QLV/32G at Amazon.com
G.Skill 32GB DDR3 PC3-17000 2133MHz Sniper Series (10-12-12-31) Quad Channel kit (4x8GB) at Amazon.com
G.Skill 32GB DDR3 PC3-17000 2133MHz Sniper Series (10-12-12-31) Quad Channel kit (4x8GB) at Amazon.com
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