Have you actually looked at his "smooth" gameplay?
Seriously, I'm looking at his GTS450 Witcher 2, it's TERRIBLE.
Its a GTS 450, do you know what that is? its baisically like an Intel iGPU. and not even a good one.
His mistake is running everything on just about full settings at 1080P, in doing that sometimes he's getting smooth FPS sometimes he isn't.
The point is he is getting a lot more performance on that GPU than he should.
What he need to do is run 3dmark11 and post the link, simple.
Even that would not be enough.

