I have an AMD 9590 CPU, sapphire dual x r9 280 GPU, hyper 612 ver. 2, cpu cooler, and a sabertooth 990FX r2.0 MOBO. for some reason when i am using my computer once at random times it will completely freeze. it has dont this when i am watching movies, playing games, etc. Is this because something is overheating, not getting enough power or what? please help.