pc turns off when starting game

i'm not sure but i think my cpu might be overheating. When i open certain games, before i could get to the menu, my pc turns off (no blue screen or anything). But if i play a game that doesn't turn off my Pc it gets pretty hot: 55°C on average. All my fans are working correctly, i just bought...

Hi guys, my ASRock Z97 Ex4 just died on me after moving, and this is the second time I had this mobo (first time had a manufacturer problem.) I'm hesitant to get the same one a third time because it doesn't seem that reliable after going down twice on me (I do really like how it looks though.)...