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
Worth buying mid 2015 MacBook Pro? I7, 16g ram and a GPU? : r/macbookpro
MacBook Pro 13" Retina (Mid 2014) 2.6 GHz Logic Board