The advice to buy dual, if that is what you really want, is sound. However, none of us really know what the after market folks will come out with. I upgraded my 450MH G4 Cube to a dual 800MH G4 with an after market kit. That was supposed to be impossible. But it worked. (The upgrade was not for the faint of heart. But that is another story.) Who knows? In three years they may have low power, low heat 5GH G5 dual cards that plug in where your single CPU now sits. Then again, it may never happen. Good luck! Brian Silverio ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.