Nvidia Geforce Graphic Card Driver Needed

Hi,
I have a huge problem with my graphics card (Nvidia GeForce GT 220). It overheated to 80° C at rest! And when I play a game, the screen turns off.
At first I thought to dust, I cleaned from top to bottom from inside my computer. I even removed the graphics card and cleaned the air, fan, etc. But unfortunately, it continues to overheat at the same temperature!
I really need your help! Thanks.
