Apple MacBook Pro 15" Retina Mid 2012 Logic Board 2.6Ghz i7 8Gb Ram A1398 / DG | eBay
MacBook Pro: How to remove or install memory - Apple Support
Mid-2012 Macbook Pro 16GB RAM Upgrade How To - YouTube
I got a mid 2012 MBP 15” for free. So I threw in 16 gigs of ram and a 500gb 860 evo. : r/macbookpro
A-Tech 8GB 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
Now Here's a MacBook Pro That's Easy to Repair | WIRED
16 GB RAM Upgrade on MacBook Pro 15" (mid 2012) NON Retina - YouTube
Memory RAM Upgrade for Apple MacBook Pro 15-inch Mid 2012 4GB/8GB DDR3 SODIMM | eBay
iFixit Launches Repair Guides for Retina MacBook Pro - MacRumors
CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® MacBook Pro Core I5 2.5 13" Mid-2012 - A7 at Amazon.com
A-Tech 16GB Kit (2x8GB) 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