NEMIX RAM 16GB Kit (2x8GB Upgrade) DDR3-1600 SODIMM PC3-12800 for Apple MacBook Pro Mid 2012 / iMac Late 2012 / iMac 2013, Late 2014, Mid 2015, Mac Mini Late 2012 at Amazon.com
Used - Apple MacBook Pro Retina 15-Inch Laptop - 2.3Ghz Core i7 / 8GB RAM / 256GB SSD MC975LL/A (Grade B) - Walmart.com
Does the mid-2012 13 MacBook Pro have an M.2 slot that I can use for an Intel Optane memory upgrade? - Quora
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
Samsung ram Memory 8GB kit (2 x 4GB) DDR3 PC3-12800,1600MHz for 2012 Apple MacBook Pro's, iMac's and 2011/2012 Mac Mini's at Amazon.com
Mid-2012 Macbook Pro 16GB RAM Upgrade How To - YouTube
4gb Ram Macbook Pro 2012 Hotsell, GET 52% OFF, www.islandcrematorium.ie
Logic Board for Mid 2012 15" MacBook Pro Retina i7 2.3GHz 16GB Ram 820 - Part Haven