Hi, I recently noticed that while I am playing demanding games such as Rise of the Tomb Raider and Assassin's Creed Unity on maxed settings my PC case is warming up quite significantly (on the sides and on the top) and I hear kind of a sound of fan working hard. However after I exit those games the case cools in a short time. My specifications are processor Intel i-7 6700 (non K) and graphic card Nvidia GTX 1070. Should I worry about the overheating or is that normal?