Right now I think you can't, unless you can get your hands on a cheap dual socket motherboard for the new Xeons. Even then, the PCIE SSD will get you over the l

Right now I think you can't, unless you can get your hands on a cheap dual socket motherboard for the new Xeons. Even then, the PCIE SSD will get you over the limit. I really like the new Mac Pro, even if it's not upgradeable...