MCE is an option unrelated to an unlocked multiplier restriction, merely allowing the MB to apply the turbo freq to all cores. It (MCE) does work on Asus boards with the 8400, as reported by several reviewers....
There has already been a minor debated 'controversy' over this option being called 'cheating' , as clearly if on by default, it would boost one MB's results over another with such a feature off by default, which is the case...