Is my ATI All In Wonder 9000 being bottlenecked by my Intel Pentium 3 800mhz?

Just finished building my analogue video + Windows XP gaming PC but have run 3DMark 01 and noticed its scoring almost half the points a All In Wonder 9000 should score. Its doing 4500 points where it should be just under 8000. What do you think? is this my CPU bottlenecking the GPU or is it some other issue, GPU overheating maybe?

Specs:

Pentium III 800mhz