Which RAM to buy for iMac 27-inch Late 2012? | MacRumors Forums
Apple iMac 27-Inch (2012) Review - SlashGear
Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
iMac 27" 3.2GHz (Late 2013) | mac of all trades
Apple's 2012 iMac: Ready for its close-up (pictures) - CNET
A-Tech 8GB Kit (2x4GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com