It would be possible, but not cost effectively, given the cost of Apple repair parts.I don't mean to hi-jack the thread, but I do have a question about this. If I were to buy the the quad, could I upgrade the MB and CPU(s) later down the road? When Apple comes out with new models, will it be possible for me to buy that hardware and upgrade without buying a new MacPro?
So the best bet would be get a used or refurbished machine later if you have to, and sell the existing machine, if an Octad can't be had now due to financial reasons.