I got some strange problems with a windows driver, and then I restarted the computer, and it wouldn't display the bios and so. Something was wrong with displaying ASCII.
As soon as I have enough money, I'll buy the cheapest NVidia videocard. I've had nothing but troubles with modern ATI videocards (old ones, like mach64, were always good though)
And yes, I tried every old and new driver, including the omega driver.