Eh, I disagree. The 9400m is going to be about as powerful as a 6600GT, but it's not easily or substantially faster (especially in older games where the 6600GT would probably be faster). I think if you look at the release of the 8500GT, which has the same 16 stream processors as the 9400m, and you'll see it getting beaten pretty badly by the 6600GT. Just add about 10-15% to the 8500GT's performance and you should have the best estimate for the performance of a 9400m.