Adamanta 16GB (2x8GB) 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 RAM at Amazon.com
Apple iMac 21.5-Inch (2014) Review | PCMag
How do I upgrade my mid 2014 21.5 iMac? - iMac Intel 21.5" EMC 2805 - iFixit
Apple iMac with 5K Retina display (27-inch) review: Apple's 5K iMac impresses expert eyes (review) - CNET
How much is a 2014 iMac worth - OurDeal.co.uk
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
iMac (Retina 5K, 27-inch, Late 2014) - Technical Specifications