I have two Radeon hd6970 graphics cards connected with crossfire. Today after installing the new crimson drivers (i just put a fresh version of windows 7 premium x64 [cracked]), the drivers seem to have installed fine, however, when I performed the mandatory restart, the display never came back on. I cant even tell if windows has been able to boot up. nothing, just blackness. Wont try to make my monitor turn on or anything, no output.