
Well, do we see a big leap in performance? At 800*600 the 16-bit line of both card is way over the ideal line, which is perfect (60 fps at the given resolution). We can see the 3DB, with just a little bit more bandwidth, performs better in 32-bit. Let's look at demo2:

Interestingly, here we find that at 800*600 both lines are on or above the ideal line, which means a perfect fill-rate score. Even at 16-bit 1024*768, you have enough fill-rate to get a good frame-rate of 60 fps.