Memory RAM Upgrades for MacBook Pro (2012 - Late 2016)
MacBook Pro 17" Unibody RAM Replacement - iFixit Repair Guide
OWC 8 GB (2 X 4GB) ram PC8500 DDR3 1066MHz sodimm 204-pin Memory Upgrade Kit, (OWC8566DDR3S8GP), Compatible with MacBook Pro, MacBook, Mac Mini and iMac at Amazon.com
Mid-2012 Macbook Pro 16GB RAM Upgrade How To - YouTube