Hello all, I have a 2.66ghz Quad-core 4.1 Mac Pro with 10GB RAM and a ATi 5770. I am looking to upgrade to either a 660Ti or a 670. Basically I want to improve my gaming experience in Boot Camp, and play at decent settings for the next 2 years. I currently play at 1920 x 1200, but may wish to increase this in the future. As far as I know, the 660 Ti with its 192-bit memory bus is optimal to handle current games at 1920 x 1200, but may struggle in the near future, meaning that the 670 (with its 256-bit bus) might be the better option for future proofing. But am I bottle-necked by my CPU anyway? If I am upgrading purely for gaming, would the 660Ti be the better choice as the extra money on a 670 would be wasted if I would not see in any benefits? And please, no comments in the vain of "why did you buy a mac pro to game on?" I didn't I am simply looking for the best way to spend my money on pro-longing the gaming options on my machine. Thanks for any advice!