Other than running the PCI bus at weird speeds like 38.75MHz, what factors limit stable bus overclocking? Is it the components or also the board design too?
My old G3 MT used to run stable at a 83MHz bus, but its XPC106 chipset (Heathrow? Grackle?) was rated as such. My current G3 DT’s chipset is only rated to 66MHz, so I’m not sure how it would fare.