|did u overclock ur cpu, ur grahphics card? check the cpu and graphics card temps,|
use gpu-z(google) to check the graphics card temperature in the sensors tab, and use speedfan(google) to check cpu and other hardware's temps.
the cpu u have should not exceed 60-65 degree or 70
the graphics card should not exceed 80 degree altho the 8800gt's temp rises a lot
computers are a second home