Running Autocad on Mac
By the way, I don't know about the graphics card requirement for Autocad, but I can tell you that last I checked, Parallels wouldn't handle the driver in windows for dedicated graphics you need in 3D CAD like Solidworks or Pro-E. You'd want to use Bootcamp, rather than Parallels.
In addition, Solidworks required Win XP Pro, rather than basic XP.