Greetings, two strange things happened while in overclock, first time after i put 1.40 vcore in bios my computer started to work but nothing happens, only noise of fan, after that i had to reload bios default settings, then i returned to 3.8 with 1.31 vcore where i'm stable but today the bug of 4ghz couldn't leave me in peace so today i tried again, another thing happened today after i put 1,40 in bios and after i restarted the pc in order to go to bios again, my keyboard lost access to it, delete key worked to enter bios but once there couldn't move anywhere with keyboard, i've tried about 3 or 4 times, nothing, i had to remove the jumper on motherboard in order to clear cmos, then again after enter the data, back to 3.8ghz, don't know what is causing this, any ideas?