RH9 doesn't support your graphic card.
You have to download the drivers from the nvidia site
http://www.nvidia.com/content/drivers/drivers.asp
After you must chose for RH to boot up in text mode, not gui mode. Then log-in, install drivers and after edit the /etc/X11/XF86Config according to the Nvidia drivers README file.
Then simply start the X server by typing startx, and that's all !
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