Originally Posted by
.Maleficus.
One thing you should do when you OC is base your settings off of _your_ system, not other people's. If you want it at 400, work you way up, increasing voltages as needed.
Also, you are changing the FSB (front side bus). Intel "quad-pumps" their processors, meaning its 400x4. Hence, the 1600 FSB. Some BIOS (like mine) show the output of the post quad-pumped number (like mine is at 1485ish).
Like I said, take it slow, up the FSB but with small increments, run Prime95 a lot, when you get an error, up the voltage... It's very tedious, and boring, but a good OC should take a couple of weeks to do.