You can, but the processor you've got is already faster than anything Apple offered for the G4. If you want dual processors as fast as what you already have, or faster, you'll have to go with an aftermarket processor from a company such as Sonnet, Powerlogix, or Newer Technology. You can get dual processors as fast as 1.8GHz from them. -- Rich > -----Original Message----- > From: arlen tackett > > Can I turn a single processor machine into a dual processor machine? > my machine: Sawtooth AGP 400 256 ram. that's what it was when I got it, > now it's 1.6Gig Processor, 1664 Ram, SATA 80 Gig (on a pci card), and the > OS is on a 60 Gig ribbon drive. I run Pro Tools recording software on it > and it drops out (sometimes) I've tweaked it and it still drops > (sometimes) the error message is 6106 (too much for the CPU basically). it > is proven that the old 100 bus can handle the software if there are two > processors. > Thanks ! > Great Forum! > Arlen