Quote Originally Posted by Vivi View Post
But my bios was dead, and now its working and it's F4 instead of the old bios that it was.

Maybe i got lucky?
I haven't played with the Z77X-UP5 but I doubt you can "break" or "kill" the BIOS. Most likely your OC settings were unbootable and it just reset itself.

Can you look somewhere in the bios and see what versions are your main/backup ?