820-3332-A) Logic Board - MacBook Pro 15″ A1398 (2012-Early 2013)
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
Apple MacBook Pro (15 inch) review: Apple MacBook Pro (15 inch, Summer 2012) - CNET
Memory RAM Upgrades for MacBook Pro (2012 - Late 2016)
16 GB RAM Upgrade on MacBook Pro 15" (mid 2012) NON Retina - YouTube
MacBook Pro 15" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
MacBook Pro review (13-inch, mid-2012) | Engadget
Apple MacBook Pro with Retina Display (15-inch, 2014) review: Still the best higher-res laptop, but the competition is catching up - CNET
Does the mid-2012 13 MacBook Pro have an M.2 slot that I can use for an Intel Optane memory upgrade? - Quora
MacBook Pro 15" Retina Display Mid 2012 Teardown - iFixit
Pixelpalooza: 15“ Retina MacBook Pro reviewed | Ars Technica
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
Apple MacBook Pro 15" Retina Mid 2012 Logic Board 2.6Ghz i7 8Gb Ram A1398 / DG | eBay
What six years of Retina MacBook Pro evolution gets you | AppleInsider
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
Amazon.com: Odyson - Logic Board 2.3GHz i7, 16GB Replacement for MacBook Pro 15" Retina A1398 (Mid 2012, Early 2013) : Electronics
Refurbished 2015 Apple MacBook Pro Quad Core i7 2.8 15" Dual Graphics 16GB RAM 2TB SSD MJLU2LL/A A1398
MacBook Pro 15" Retina Display Mid 2012 Teardown - iFixit
MacBook Pro 15" Retina Display Mid 2012 Teardown - iFixit