P5B + Q6600 + latest BIOS == 9x ONLY multiplier??

[ChaosMinionX]

That your problem right there....your using a dinky cooler on a quad and trying to OC it like mad Dual Core that cooler was fine, Quad move up to a Thermalright Ultra-120...and if your chip does 4050mhz 450x9 at 1.4875 that is a very nice chip...however its highly unlikely, and is only the fact that the bios is reporting the speed wrong. Stability of anychip has alot to do with thermal management, and sometimes it comes down to a hardware limitation.

If you had windows installed you could easily see that.

And in my findings of FSB and chips....My quad will do 400x9 at like 1.4-1.45v 450x8 at 1.4875... and 500x7 takes anywhere from 1.5 to 1.55 for complete stability as well as an increase to NBvoltage and vFSB....there are numerous factors to describe your overclocking woes..... but that board is running the multi and FSB you set, just not reading the change....