Everytime I play games on my computer like league of legends or overwatch. about 20 or 30 minutes later my computer all the sudden Froze. i couldnt get out of game. cant use task manager. I waited for a while. then the computer shuts down by its self. i checked my tempatures while playing some games. they were fine. gpu temp is around 70 c cpu temps around 40 c hdd 31 c always. I've updated the gpu drivers and mb. and it still freezes the computer that requires me to hard reset. Can you guys please tell me whats wrong with my computer and how i fix it?