This is a 8600 card, dual DVI ports. Clearing CMOS may have corrected the issue. I am still learning some of the BIOS settings. Also, part of the issue may be that I am running a 50' VGA cable to the plasma. Main monitor is my LCD desktop monitor. PSU should be okay: 18+18 amps on 12v rails should run one 8600 card no prob. It's a 450 watt Fortran.