From what I understand, locked CPUs run at a predetermined multiplier. I doesn't matter what you set the multiplier to on the mobo, it always uses the locked one. For example a 766 celeron 66Mhz FSB must be locked at 11.5 right? 66x11.5 gets you 766. So theoretically, if I cahnge the FSB to 100Mhz, I get 1.15GHz? Do I have to change any voltages? Obviously some cooling is needed. Example I have an ASUS P2-99. Does a range of FSB from 66Mhz-150Mhz, and multipliers up to x8. However the multiplier makes no difference because my 766 is locked at 11.5, right? So if I up the FSB to 100Mhz, which keeps PCI/33Mhz AGP/66Mhz (2/3 ratio) and my RAM is PC133, I should get 1.15GHz! Please tell me if I have no idea what I'm talking about. Thanks!
If u have no idea what you're talking about, then don't OC. If you must, yes, you have to raise VCore to support that, but also remember that it may not be able to handle 1.15GHz. And you will not need more cooling, you will need tons more. Water would be nice.