Bios Mods -The Best BIOS Update and Modification Source

Hi i have ga-ma770-us3 rev.2.0
and i want to unlock th 4th core for my cpu Phenom II x3 720be
but with the original bios i see the 4th core in the bios
but my operating system freeze on the starting windows image>
i thought U could help me
thanks anyway>..

and i use this bios:
http://europe.giga-byte.com/FileList/BIO...2.0_fg.exe

I don't think the BIOS is the problem. More likely, the fourth core is defective or it requires additional voltage in order to be stable.

do U have any recommended voltage or multiplier or something else to change
cos i tried some but it didnt make it>

Well, as far as I know, some of the unlocked cores require very high voltage in order to run correctly - like 1.45V+.

Of course, the fourth core of your processor might also be defective, so no matter how high you set the voltage, it won't be stable.