1) That mobo may have the BIOS it was delivered to you with in a backup storage area. Check your mobo manual (download it if you don't have it) and see how to access any BIOS that might have been saved.
2) You say "auto overclocking" - maybe the software that came with the mobo was used to overclock it? Tweak-It or some such? Again, check your manual.
3) Call the folks who "auto overclocked" it. They should have provided the settings or saved the BIOS or told you the methodology because this crap happens all the time.