Hi Guys Please Help Me If You Can :?

my computer contiue to freeze every time .. whatever i do ( play games .. nothing .. internet )
my computer is :
Intel DX58SO Board
Intel Core I7 920 2.66
Patriot Ram DDR3 Sector 5 - G Series 1600MHZ
Hardisk 500 GB + 1000 GB
2 X DVD RW
Power Suply Antec 750 Watt
EVGA GTX 470 1.25GB DDR5


Please Help Me IF There any uncompatiblity with the my hardware that may have caused this problem .. ps: i have made format and new window for my computer and still no change
my windows is 7 ultimate 64 bit