ATI Technologies RADEON X1650 - Manual (Page 13)

System Requirements 5
To uninstall previous drivers
With your current graphics card still in your computer:
1 Close all applications that are currently running.
2 Navigate to the Control Panel and select Add/Remove Programs.
3 Select your current graphics card drivers and select Add/Remove.
The wizard will help you remove your current display drivers.
Note: If the previously installed graphics card has any additional
software installed, it should also be removed at this point.
4 Turn off your system and remove the old graphics card.