hello guys. i have i3 4130 8GB RAM DDR3 gtx 650 1GB H81M-K and fake 400w suply, and when playing games it freezes in like every 5 second. and after 1-2 hour screen goes black and nothing happens until restart. i did memmry diagnostic and there was not problem. also i changed videocard from gt730 to gtx 650 and still freezes.i updated drivers instaled new windows and nothing worked. i though it was hdd problem becouse it was 99% and it causes it but no. becouse for example i downloaded cod mw3 today and it can run it on ultra settings with 60 fps but freezes in every 10 sec but when i choose lowest settings it doesnt freezes. so its not hdd read problem. so does anyone know what causes freezing? maybe fake 400w suply isnot enough? i changed thermal gel also but still freezes.