My Mac Pro (2.66 GHz, 5 GB RAM, 7300 GT 256 MB) is having graphics card issues again. Instead of having to take it into Apple for another card replacement I've decided to purchase a new card altogether. I'm looking at the 8800 GT, but I'm not sure if it will if it my Mac's configuration. My knowledge on graphics cards isn't as good as it used to be, so what do you recommend? I run dual displays at the moment with the 7300 GT and I can notice a drop in framerate now and then when using Expose and similar features. Would the 8800 GT fix this? Thanks, I really appreciate your advice!