>-what is the speed of the PCI bus on an older powermac? (is is 50% bus >speed?)
It should be normal 33Mhz >-If I clocked up my PowerMac 7300/180 (45mhz bus) to 175 to 200 mhz on a >50mhz+ >bus would I be getting a faster PCI bus as well? I don't know if the PCI clock is derived from the bus clock, I don't think so but others may have more experience with such tweaks. >-What about the onboard video and ethernet? Is that effected performance wise >by the increased bus >speed? Difficult to say. Onboard video might, I don't think ethernet would make any difference (except maybe if the result is also to increase the memory and cache throughput). >I know a few old video cards for my IDT 225 WinDoze system didn't work when I >tried to go to an 83mhz system bus and a few even older ones that >wouldn't work >at 75mhz system bus. > >-Should I worry about old PCI cards not working at "overclocked" PCI bus >settings on the PPC-MAC side? > > >I should probably go find a PowerMac listserve for these questions...if anyone >knows one I'll gratefully take my questions there instead. Ben.