Huge fps increase with little overclocking

[Cheefa]

Goes right back to 4-12fps. I turned it up a little more to 2.35 with no diff in performance. Everywhere I read says my CPU should easily go to 3ghz but even at 2.5 it will freeze on the bios screen. I have the voltage set to 1.4 and the fsb raised to 287. That's all I changed. When I bump the CPU multiplier up to 9 from 8 it just resets back to 8 once I restart the computer.