I used to own a HD6850 and there I had a monitor with HDMI(my TV), a monitor with DVI and a monitor with a mini-displayport connected. It worked perfectly. I recently switched to a XFX HD7970 Black Edition and now my monitor with DVI doesn't work anymore(it simply doesn't turn on, not even when booting). Does anyone know how to fix this? Or do you require extra information?
NINJA EDIT: Ok, I just switched to the other DVI port and restarted my PC "et voila!" it worked. Leaving this here in case anyone else has this problem: just switch to the other DVI port!