thank you! so it is the PSU and not my video card..
there are things that i dont understand on PSU, like these numbers " MAX of 32 amps on the 12V rail "
so is it ok for me to remove my DVD-RW and put the video card back? will it work? thanks clarkjd
That means that the most current that your PSU can supply before shutdown is 32 amps. Since most of the components of your PC are powered from the +12 volt rail, it is likely that you are trying to draw more current than the PSU can supply. Compared to video cards, DVD-RW use very little power, and then only when burning a DVD or CD. I don't think that removing the DVD-RW will free up enough power to let the video card run correctly. It might work for web browsing, and such, but not for gaming.