Thanks for your answer.HCMarkus wrote:Unfortunately, you would need to get your hands on a dual processor tray and two heatsinks, an a and a b, to convert a single CPU Mac to dual CPU. These parts are not cheap.
If you want a hot single CPU Mac Pro, the best deal now is to buy a 2009 quad ($500 at MacOfAllTrades.com), flash the firmware to 5,1, and install an X5680 or 90 or W3680 or 90.
I was imagining I could install 2 CPU in one single CPU machine but as you explained, it would be a complicate and expensive task.
I'm just looking for a dual 5,1 or at this point if it's not complicate even a 4,1 macpro. I would like to substitute my second macpro (3,1) which it could be upgradeable, but apparently the bench test difference on the 3,1 between stock CPU and faster CPU are negligible so the CPU game is not worth.
If you have any other model advice, I'll appreciate. Thank you so much
ciao