In most cases yes. The exception is that some early Sawtooth machines that are not dual CPU capable. There's a program that will tell you what version you have and whether it'll take a dual CPU card. -Hal On Nov 15, 2004, at 9:56 AM, rich northouse wrote: > Can you put a dual upgrade into a single cpu machine?? > > rich > > On Nov 14, 2004, at 9:56 AM, Jamie Pruden wrote: > >> Hi Hal, >> >> With all else being equal, the dual 1.33 will smoke the 1.5 in >> Photoshop, iMovie and iDVD. >> >> I don't believe that VPC is dual processor aware, however, and many >> games aren't either. I guess it's a trade-off. >> >> Going forward, you may find that the dual processor will become more >> significant as more programs become multiprocessor aware... if it was >> my dime, I'd go for the dual. >> >> smiles, >> Jamie >> >> On Nov 12, 2004, at 11:12 PM, Hal wrote: >> >>> I'm considering upgrading a Quicksilver 867mHz G4. I've been looking >>> at OWC's 1.5gHz and also at the various dual CPU options (Giga and >>> Sonnet). I prefer an adjustable upgrade, so I can tweak it for >>> maximum performance. >>> >>> Would I see more of an improvement from a dual 1.33 or a single 1.5? >>> I'm mostly playing games, some iMovie and iDVD, some light photoshop >>> work and VPC. >>> >>> Any info is appreciated. >>> >>> Thanks in advance. >>> -Hal