A1502 Logic Board (2.4GHz Core i5, 4GB RAM) for Apple MacBook Pro Retina 13 inch
SOLVED: Can RAM be upgraded? - MacBook Pro 13" Retina Display Mid 2014 - iFixit
2014 Apple MacBook Pro Core i7 2.5GHz 15"
old macbook pro retina ram upgrade to 32go? | MacRumors Forums
macbook pro - Can I upgrade RAM on late 2013 retina Mac Book Pro? - Ask Different
Apple MacBook Pro Retina 15", Mid 2014, Core i7 kaufen - Revendo
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