No, my computer is not overclocked in anyway. But I will try the restore optimal defaults and let you know. And no I don't adjust the voltages as I do not know what I'm doing with that lol.
My ASUS MB will change voltages and frequencies while I'm gaming through it's own software (AI Suit). To use that I had to install a CPU water cooler or it would over heat. Before I did that I had to stop it from overclocking my system.