Driver 190.18 slowed down computer


I have nVidia Quadro FX 770M in my HP notebook. My linux kernel is 2.6.30-2-amd64. I used the driver 185.18.14 and everything worked fine. But I needed a cuda driver so I installed the newest driver 190.18 with cuda support. Well, cuda is worknig, my computer passed the tests (deviceQuery and bandwidthTest) but the performances felt down dramatically. When I minimize or maximize a window it takes some time and it is not fluent. But with driver 185.18.14 it was allright.
And for example, using the glxgears utility, I had 3000 fps with 185.18.14 but with 190.18 I have only 1000 fps.

Should I wait for a new cuda driver? How long? Or is there an other driver? Or is there an other solution?