See <http://www.powerlogix.com> and <http://www.sonnettech.com> for it. But I would buy a MiniMac. Paul Moortgat On 18 Oct 2007, at 05:15, Bruce Ryan Nakamura wrote: > Hello, > > It is possible to upgrade my single processor G4 MDD 1.25 MHz to a > dual 1.25 MHz unit just by changing the microprocessor? > > Thanks, > > Bruce Ryan Nakamura