Am I missing something . . . :?:
. . . I don't understand why everyone is under the impression that there's no info on clock multiplier changes.
All the info you need is on the spec sheets for the various PPC CPUs! All that needs to be done is to lift four legs on a QFP or cut four traces on a BGA and hotwire the resistor setting combinations to achieve whatever clock multiplier you desire' date=' you could probably even hotwire the inexpensive clock setting rotary switch (?) adapter that's readily available on eBay into the circuit for experimental purposes.
There's no need to EVER search for the (well hidden on the 5300/1400/2300c) resistor arrays on PB MoBos, AFAIK. [b']Just do it[/b] . . .
. . . HACK'EM!!!!! }