Graka problems :(

Hello cF,

I bought a new Geforce 9600 GT today.
After installing drivers everything worked fine and i was very happy.

But there is one Problem with ET
when I Connect to a server it looks like this:



Same is when I'm in the Limbo-menu or zooming when I am sniping


Anybody had this problem before?
Anybody have a solution for this?

Thanks for answers