iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Apple's 27" iMac Late 2012 model. How to upgrade the ram to 16GB - YouTube
4GB PC3-12800 RAM for Apple iMac Late 2012 - 27 Inch MD095LL/A Memory Upgrade Module
Apple's 2012 iMac: Ready for its close-up (pictures) - CNET
Install memory in an iMac - Apple Support
Apple iMac (Late 2012) review (21.5- and 27-inch) | Macworld
Install memory in an iMac - Apple Support
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 - Walmart.com