OWC 8GB (2 x 4GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S08S) at Amazon.com
Amazon.com: 2.6 GHz 16GB RAM Logic Board 820-3332-A for Apple MacBook Pro 15" Retina A1398 2012 Early 2013-90 Days Warranty : Electronics
I got a mid 2012 MBP 15” for free. So I threw in 16 gigs of ram and a 500gb 860 evo. : r/macbookpro
13″ MacBook Pro teardown: Easy SSD, trackpad access, no room for RAM | Ars Technica