those are all integrated chips, they were probably giving you a choice of wat motherboard actually.
Actually probably not. at some point there's probably an assenbly line split by models, but the starting point is likely the same mobo and then they add the graphics mini board.
The only upgradable laptop graphics are MXM nVidia chips on DELL XPS / 9300 and select oem gaming/entertainment laptops
Actually there are many more than that, and not just nV.
ATi has their Flexfit connector strategy that allows them to use their proprietary Axiom (PJ3) connector and nV's MXM.
You probably could upgrade his rig, but it's likely neither worth it nor easy.
no upgrade for u 8O :x