It depends what type of application you're benchmarking. If it's a game for example then having it run at a higher resolution on the 17" would obviously lower the frame rate. Of course you could simply lower the resolution to match the 15".
But I'm sure I've read quite a few times that the graphics card in the 17" automatically clocks higher when the demand is there than the 15". I think I read it on the
www.barefeats.com site when they were doing a comparison.
Anyone wanna confirm this? Or am I wrong?