Retina Early 2013 - MacBookPro10,1
Compatible upgrades for: ME664LL/A, ME665LL/A - Early 2013 15-inch Retina Macbook Pro's.
Standard RAM: 8 GB
Maximum RAM: 16 GB*
Details: *8 GB of RAM is onboard. It could be upgraded at the time of purchase to 16 GB as a US$200 option, but it cannot be upgraded subsequently.
RAM Slots: 2