Computer Quits out of games for "unknown reasons"

ajax827

Honorable
Jan 5, 2013
2
0
10,510
CPU - Intel quad core i5 3.4 GHz
Graphics - EVGA 680
MB - Asus P8Z77-V
RAM - 16 Gb of kingston
Cooling - Corsair h60

Whenever i go to play Assassins Creed III on my newly built computer it crashes at random points in the game. I monitored my CPU temps while it crashed and it never went above 55C. I'm fairly new to building computers so it may be a dumb mistake, but I'm just not sure what is wrong.