All bios sections need to be updated (if not that could be the cause for a non perfectly working bios).
How did you flash your board ? I tried with afudos /ixxx /pbnc /n, EZ-Flash and Asus Update, in three case I got the same problem : at each boot, I got a message "Overclocking failed! Press F1 to enter setup. Press F2 to load default and continue." Of all the BIOS settings, only the time and date are saved, when I press F1 I enter the BIOS I see the default values for all the other settings. I had the same problem with the 504 modded BIOS by Niko76. No problem with 504 and 602 official BIOS.
You simply need to press F1, setting your bios, hard drives, etc etc and then exit and save all and everything will be fine. Is it so difficult for you ??? I don't think so.
Of course, I did this... But I still got the message. It looks like the settings are not saved when I exit the BIOS.