So after buying new cmos battery it's still the same, anyone knows what could be the problem?
Edit: Marking as solved, because have no idea what else could be wrong and buying new motherboard is to...

A week ago my PC shut off while trying to play dota 2. Pressing power button did nothing, read thru internet that it might be PSU. I believed it for few reasons:
1. I bought it used one, because...