Just FYI, the Ageia physx UT3 maps are said to run horribly slow without ageia physx card and I hear users on epic gaming forums reporting of around 10 fps or even lower than that on their "decent" (not quite typical XS system but close anyway) with GTS G80 or so on a lower res like 1280x1024 so if I would see even 30 FPS in 1280x960 I use I'd be positively suprised as that would be a huge speedboost although still a low fps but that doesn't matter, the fps difference is what counts.
Just saying in case you didn't try to run it without the physx driver to see how it runs like then so you don't know what to expect.
I don't think there's almost any difference in most other normal maps though, perhaps heatray somewhat but most others I wouldn't expect to see any difference really as they're not using physx, at least not to some higher extent.
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