I'm getting like one short beep every 5 or 10 minutes, from the system speaker (the one which does the POST beep). It's doing it right now while I'm browsing the net. It's annoying but I hope it isn't a problem warning... CPU temperatures and GPU temperatures are normal. I am googling the problem, on some forums they say it could be a faulty mouse or a faulty keyboard. On others they say it's a sign of the 3.3V rail of the PSU failing... I'd appreciate your opinions.