After a bit of research I am thoroughly confused. I'm not much of a gamer, though someone recently gifted me COD 4. I've read about, and have now witnessed, the limitations of my stock 7300 GT video card. Consequently, I've looked around for a new card only to learn that there are some limitations to what I can use in my computer. I seemed to have found a decent deal on an EVGA Nvidia 8800 GTS, but later discovered it's not compatible. ...umm ...right? Would I be correct in thinking these are my only options.... http://www.welovemacs.com/apmacproqu2m5.html Thanks for any help. I'm nearly embarrassed about not knowing much of anything about video cards.