Will do chap. Results to follow!
EDIT - Just installed GMABooster, and clock was set at 166MHz for anyone interested. Does seem to be an XP thing then?
EDIT 2 - 731 3DMarks after settnig 400MHz clock.
Thanks for doing that. From your results and the other I found it looks like a 3 - 5% increase, so hardly worth the bother. Good to know though.