i could never get my E6700 to go over 400 FSB (at any multi) without raising the Vcore to ridculous level...i am talking 1.65v and above...max FSB was 404!
i switch the E6700 to my P5B Dlx...i can now push it to about 460 FSB at the lower multi's...could not even get close with that FSB on the Pro...go figure!:)