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
Differences Between Late 2013 and Mid-2014 Aluminum iMac: EveryMac.com
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
iMac 2013 Model Ram Upgrade - YouTube
Install memory in an iMac - Apple Support
Apple Mac Memory Ram Upgrades Dublin
16GB -2x8GB Memory Ram Upgrade for 27" Apple iMac-14.2 Core i5 3.2GHz Late 2013 | eBay
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
16GB Kit (2 x 8GB) PC3-12800 RAM for Apple iMac Late 2013 - 27 Inch MF125LL/