FYI, these are current and near current video card options, abstracted from the passmark tables
r9 m295x: 5024
r9 m290x: 2547
r9 m290: ?
r9 m370x: 1668
755m: 1569
750m: 1362
6100: 953
5200: 1189
Of course, Passmark is a opaque, and possibly irrelevant means of ranking video cards.
Consider this data from the
similarly credulous gpuboss
nVidia 780m (once used in top end imacs): passmark 4120. Crysis 3: 29 fps Bioshock Inf: 46.8 fps
r9 m290x: passmark 2547. Crysis 3: 23 fps Bioshock Infinite: 46.8 fps
Suddenly, that huge advantage in passmark scores becomes whittled down into meaninglessness.
The MacBook Pro 15" comes with an intel 5200 and can be optionally equipped with an r9 m370x card.