I shall give an example the girlfriends machine a FX-8370 machine which is overclocked. Idle temps say around 25c Full load temps never go above 57. As Kemical has stated. Check case airflow and the tim on the cpu. May I suggest if you're going to stress test use OCCT and select linpack as it really stresses out the cpu. If it'll do at least an hour of that at decent temps, you'll be golden for gaming. Knowing what PSU you have is important as cheap or misbehaving PSUs can create temp issues with cpu's gpu's and the like.