I need help with a strange problem I have with my new graphics card. Abit AT8 32x. 2gb OCZ Ram. HIS x1900xt dual dvi out. Sharp LCD monitor dvi and VGA connection. Card produces dvi output all the way untill XP user login when monitor then displays "no signal". XP is still there because you can hear the login tune. Also when connected by VGA adaptor to same monitor desktop is present and uneffected. Is there somthing Im missing in Catalyst Control Center that can be changed to output the dvi signal?