97.73 driver question

Hi,

After installing the 97.73 driver with CUDA support, I’ve got a feeling that performance of the 3D applications is seriously decreased. For example, I’ve got a very low fps in S.T.A.L.K.E.R. - Shadow of Chernobyl game (about 20-30 fps, I guess) on Pentium D 820, 2GB RAM, 8800GTS system. Can you confirm or disprove it?