Initially driver came with nv4_disp.inf file that supports only new G2xx cards but replacing nv4_disp.inf with the same file from 175.80 driver do the job.
Driver of course supports CUDA and both of my Tesla and 9800GX2 cards have aprox. 5% higher performance
It also fix the problem introduced in earlier versions when those two cards run in the same machine. Problem was on win64 startup (maybe on other OS too, I don’t know) when it forces turning off GPUs fans. Now it is fixed.