3dmark06 is NOT a benchmark designed to yield comparable results as it's swayed dramatically by CPU power as well as selective features (yet penalizes for more advanced/additional 3d features!).
I'd say uninstall 3dmark06 in hopes that 3dmark07 may be released soon accomodating all the problems 3dmark06 has. Until then, 3dmark05 is truly the only semi-average comparison benchmark tool.
As far as your system is concerned, the X700 is a very low-end, budget videocard which suffers from dramatically low memory bandwidth/performance. For more modern games, an upgrade would likely improve things dramatically- even a cheap, budget upgrade (around $90-$150 USD would likely yield 2x-4x 3d performance improvement in modern games).