actually i did some oc since last week.
i think the second time after oc the bios told me that oc failed
also i think my mobo is not dead cuz it beeps once when i start up the computer.
my psu is definitely working cuz i did start up the computer several times but not all the time.
and also is kinda confusing because the first time i got this problem i thought that my graphic card is broken so i changed one and it worked and i changed bios battery too.