If I remember correctly, only the Gigabit Ethernet can be upgraded to 2 GB; the other G4s max out at 1.5 GB. It's been a while since I looked that up, though. Can you give us more information to help us figure out which model you have? Do you know the speed of your G4? On Mon, Sep 21, 2009 at 8:50 PM, Daividh BeaUAnO <drpzyionrecords at gmail.com> wrote: > I have a G4 and need a power supply, also can I upgrade the memory up to 2 > gs and the hard drive up to 300 or higher? -- Rich Sent from Cambridge, Massachusetts, United States