32GB Kit (4 x 8GB) PC3-12800 RAM for Apple iMac Late 2014 - 27 Inch Retina
Adamanta 8GB (1x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini at Amazon.com
Timetec Hynix IC 8GB Compatible for Apple DDR3L 1600MHz PC3L-12800 SODIMM Memory Upgrade for Early/Mid/Late 2011, Mid/Late 2012, Early/Late 2013, Late 2014, Mid 2015 MacBook Pro, iMac, Mac Mini (8GB) - Newegg.com
Mac mini Late 2014] Ram upgrade | MacRumors Forums