I can't top Ross's ultimate speed saving tip, but...
Big textures will really hit performance on older cards with a poor fill rate even if they do support that texture size, plus of course they chew up video ram, which if exhausted results in much movement of data over a probably none too speedy agp bus.
Big textures will really hit performance on older cards with a poor fill rate even if they do support that texture size, plus of course they chew up video ram, which if exhausted results in much movement of data over a probably none too speedy agp bus.