I recently installed an evga nvidia 8600gt video card. Vista 32 bit starts up fine but my idle cpu usage sits at 50%, and I can't shut down or restart properly and the system will hand after 30 minutes or so. I just end up having to hold in the power button. I have the latest drivers and it's still doing the same thing. When I pull the 8600gt out and put in my old 7300gs, cpu usage at idle is at 0% and vista shuts down and restarts fine. Vista runs fine otherwise and I can play games without a problem. Any suggestions before I rma the video card?