Graphic problem

Hello, I ask your help because I have a big problem chart. In fact when I play certain games (notemment cs: s) of graphic anomalies preceded by a big freeze aparaissent on my screen. My temperatures are quite correct viewing.

Graphics: GeForce 8600
Motherboard: ASUS P5K
Processes: E6550
2 Gb RAM Kingston
psu: 565w

Thank you.

i think its is your psu the graphic cared is fine. Your drivers are up to date?

1st test in time to update all your drivers and then clean all your PC