I used the 196.75 driver and about a week later my GTS8800 640 MB card died. I took it into work for the IT guys to look at and they said the memory appeared to be fried. Not sure the driver did it or old age. I leave the PC running 24/7. As a stop gap till the new Nvidia cards appear I have bought a 9800GT and rolled back the driver. All appears to be well.