I purchased a 500 mhz G4 from a friend of mine a few months ago. The purchase represented my first foray into upgrading mac hardware. As you might expect, the bottleneck for this system seems to be the processor. However, I really don't want to spend 3-4 bills on an 3rd party processor for a simple speed bump (remember, this is a toy to play around with). Consequently, I became interested in changing my G4's processor with one from another G4. From what I've read, the Sawtooth processors and the Gigabit processors seem to be easily compatible. Can anyone confirm this? I have my eye on a dual 500 mhz processor from a Gigabit G4. I have 2 questions about this: 1. Can I replace my 500 mhz processor with the dual 500 mhz processor with no hacking (both have 100 mhz bus). and 2. Will this be worth it? Do you think I will see a significant processing boost? Thanks to everyone in advance!