I have a Radeon x1800xt 512 card that i'm using with an Abit KN8 SLi motherboard. Now I know that you need a crossfire ready motherboard to use crossfire and SLi is specficially for Nvidia cards. Unfortunately a year ago when I built my PC I was a dumbass and not aware of this (I thought SLi was for both Nvidia and ATI). With that and the rest of my setup, my PC is pretty beefy....yet I still get stuttering in a few games (namely Oblivion and Everquest 2). So my question is could there be some kinda bottleneck or maybe i'm not getting the full power out of my video card because of this mismatch with the motherboard?