Hi there, I just bought a rMBP 15.4, 16gb ram, 512ssd, late 2013 model.
I do a lot of raw photo editing on my mid 2012 13.3, 16gb, 240ssd, 750gb (switched out the optical drive) and it was working fine. I even worked off my thunderbolt 4TB external (which i got for cheap $200ish) via thunderbolt. I just want the graphics card in the 15 for high detail gaming as well as pushing it out to three external monitors.
I do a lot of raw photo editing on my mid 2012 13.3, 16gb, 240ssd, 750gb (switched out the optical drive) and it was working fine. I even worked off my thunderbolt 4TB external (which i got for cheap $200ish) via thunderbolt. I just want the graphics card in the 15 for high detail gaming as well as pushing it out to three external monitors.