Zorro 3 Bus Speed

[Effy]

I remember that somebody made his A4000 a lot faster by downgrading the crystal of the motherboard to something like 27 Mhz or so and that did speed up the fps of Quake a lot, though normal motherboard things screwed up so he could only use this trick when using the gfx card and soundcard ....

[Effy]

So it seems perfectly possible to install a jumper that allows you to run the 33 Mhz once the drivers for gfx card and sound card are loaded so the standard video and sound won't be used anymore ?! I thought the way to do this was to use a slower crystal and not faster ...