One works in my 8600. Quite why that "for 9500 only" is on the card is something of a puzzle

Click to expand...

Okay then so then ROM and wiring wise at least there is no problem then. I looked at the crystal on the card and it's 45mhz so that means that to get 170mhz I'm currently running a 4x multiplier. To run something like dual 300mhz G3's, I'd dare say you replace the crystal with a 75mhz one and then swap in the two new chips and you should be good to go though I'm not sure what the ROM would say about the new processors, what the OS would need to do to actually use them as G3's and most importantly, if the system can handle that 75mhz crystal. I can't find the resistors that set the multiplier for the chips so I can't see if I can crank that up and then use a slower crystal.