my 3d card sometimes, doesn't gives display

Usman Anwar

Distinguished
Sep 17, 2014
326
3
18,795
sometimes i don't get any display from my Radeon HD 7750.
when i start my PC without the 3d card, it works fine.
when i plug in my 3d card again, it gives me the display & PC seems to work fine.
can anyone tell me what is problem with my 3d Card ?
 

Usman Anwar

Distinguished
Sep 17, 2014
326
3
18,795


also, because of frequent power outage, the PC gives me the following error after i start it, most of the time.
can u tell me why is that ?