How do you downgrade your bios? I tried going into options but it wont let me. Incompatible EEPROM. I think I've really mucked my board. Basically, the computer started having problems getting into windows even at stock. It kept freezing \ restarting before booting the login screen. So, in my wisdom I decided to flash the bios to 602 and see whether that would solve the problems I've been havng with OC and getting it to boot up properly again. Well, it didnt help and started giving me checksum errors. So I decided to go up to 903 see if it was just a corrupt flash, didnt work and now I can't go back. This thing is annoying the hell out of me. Built it, worked fine. Started to OC it, started to get the hang of things then it began randomly not letting me into windows. Now its refusing to boot half the time. Have run mem test for 7 hours and it hasn't found any errors. Can run prime all day at stock and 3.2 np with good temps although highish volts (1.386) and the computer runs smoothly once at XP. Finishes 3d mark with reasonable results, plays UT3 smooth @ max settings no probs but now its just dieing and I dont know why. What can I do?