Jeg ved ikke om dette kan hjælpe.
You understand that 7F is not really an error, right? 7F means it's just waiting for input from you because either the settings have reset or you have a keyboard error, if you haven't excluded that in the BIOS.
Now, if you get a 7F code with a graphics card installed and you don't get any picture, then that means your card didn't initialize. When this happens, take a look at the back of the video card and tell me what light you see. If it's green, then try booting into BIOS when the card is displaying picture, then raise your IOH vcore to about 1.2v., and see if that works. If that doesn't work, then try raising the PCI-E frequency to about 110-115. After that, raise the IOH a bit more.
Viser LED et problem omkring 24/25 error-code evt ?-
Sørge ihvertfald for at kortet sidder godt i bund i PCI-E porten og prøve engang på begge DVI porte og sørg for skærmkablet sidder godt fast.