Which Model are you talking about? As far as DX9, OpenGL support, & image quality, All Radeons 9500, 9600, 9700, 9800 are exactly the same. In those respects you won't find any differences whatsoever. What they all differ in though are basically configurations targed at different performance levels.
My OS features preemptive multitasking, a fully interactive command line, & support for 640K of RAM!