But, consider the original 350 and 400 SawTooth G4s. Many were single processor and cannot use a Dual CPU at all. If you want dual later, buy dual when you purchase. Better to just be done with it outright than search for 3 years for what you wanted originally as a retro-fit. jj On Saturday, March 13, 2004, at 08:27 AM, Power Macintosh G4 List wrote: > [G4] Dual CPUs > Message-id: <EEBDE5C4-74E3-11D8-8CF0-00039351C4CC at rit.edu> > > no. the single processor motherboard for the G5's is completely > different than the dual processor. though at some point in the future, > if G5 processors are made available to upgrade manufacturers, there > will probably be some kind of upgrade for the single processor G5s. > > sandor > > > On Mar 12, 2004, at 10:03 AM, jgvp wrote: > >> This really is a question about the G5, which I am considering >> upgrading to. I was wondering that , since in the Dual Processor >> models there are in fact two separate bays each with its own fan for >> each of the processors, can one later add a second CPU to a single >> processor model, and if so, where can one obtain the second CPU ? I >> have searched the Apple site to no avail. Thanks.