Fleakiller & Aevm make valid points.
I just expienced a couple of issues with drivers myself.
1.)Had problems with driver 178.13 hanging when I ran 3dMark03,looked a flock of red birds taking off.
2.)Installed the latest beta driver 180.43 No fan,looked at my other monitor 68c idle bout had a heart attack!!
3.)Shut down,uninstalled,had a shot of whisky,and went Nvidia's web sight,got driver 177.79 runs nice and cool 46c idle.
PS:went from 23,760 to 27,324 in 3dMark03
9597 to 10,819 3dMark06
So you may want to try 3 or 4 to see what one's most compadible with your set up.