Better to check for bottlenecks with real games rather than 3DMark anyway.
If you look at the very first post, the 3DMark03, on Game test GT2, GT3, and GT4, there was no difference at all between 266x9, and 405x9 (it says 405x8, but he said the chips at 3600 which is 405x9.
Totally GPU bottlenecked, except on Wings of Fury.
He keeps changing the speeds on the gpu/cpu totally at random it seems, to very hard to make any firm judgements at all.
3DMark01, always seems to gain most of its performance from high fsb, P4's used to do really great on 01 when you clocked the living daylights out of them.
Nowhere does he say what resolution he's using. If its 1024x768, then I would expect most processors to bottleneck, but when your running 200+FPS then actually most people's bottleneck will be a TFT monitor anyway. (or their brain/eyes
)
Now if you run at 1920x1200, with 16xaa/af, and all the eye candy, then its unlikely that even a 1.83Ghz E6300 would be a 'serious' bottleneck, at least most of the time.