Hi, I recently got my hands on a graphite PowerPC G4: -450MHz the cpu says xpc7400 on it. -1MB cache -256MB RAM (which looks like it was upgraded since one stick says 256MB and the other I can't tell) -20GB hard drive -ATI AGP graphics which I'm guessing is the Rage 128 16MB? I know the max RAM is 2GB, but I am wondering whats the fastest cpu I can upgrade to. Any video card should be supported as long as it's AGP2x or PCI correct? Thank you.