I...

Want to o/c my Celeron to 560 (70 * 8), and I need to know what kind of voltage I should use. I have a 300W power supply, if it helps. I also have sufficient cooling in my case (coolermaster or something like that). Although, I haven't researched exactly what coolermaster is so it could be whatever inside my case (it was custom built, but not by me).

Any suggestions?

Why only a 30Mhz OC?

Anyways..just bump it up a little at a time until it runs stable. If you think you are bumping it up too much, stop.

Well thats the thing, it's on 66 * 8 (528mhz), I have a 533, so that's normal. But whenever I change the FSB, it crashes. My max multiplier is 8, as well.