Just wondering if this has been done or if it is even possible.
It is something that i would be interested in doing.
Dr. Bob's Blue Smoke uses a dual G4 card if thats what you mean.
i knew that i have seen that before somewhere, my new questions is, what duel processor card would one purchase? Which machines CPU upgrade card is compatable?
The easiest would be a duAl (not duEl, unless you want the processors to fight each other) processor card from a dual 450 or 500 model tower. Over at the cubeowner.com forums you can find stories of putting a dual 1ghz card (the upgrade sold for 100mhz bus towers, like sawtooths and gigabit ethernet models) in, but it requires using a PSU from a MDD G4 and modifying its wires to connect to the place where the DC-DC card usually sits. Not for the faint of heart, but it has been done. I want to try it, except those high speed dual upgrades are super expensive and I honestly don't need that kind of processing power.
In the light of day, I see I should clarify. I've seen only one account of a dual Ghz in a cube (and it was water cooled besides!) but several people had successfully replaced the DC-DC board with a MDD PSU.
Here's the cubeowner page for your question: http://cubeowner.com/kbase/index.php?page=index_v2&id=20&c=1