I've recently purchased a G4 'Sawtooth' from eBay at an amazing price. It is the 400 Mhz model, and contains 1.25 GB RAM (2x512 + 2x128). I can imagine that how powerful it must have been back in the day, but under Mac OSX Tiger it even struggles with playing Youtube videos, despite the all the RAM, so I want to upgrade the processor. 3rd Party CPU upgrades are very expensive, so I was looking for original Apple Parts when I came across this on eBay: It is a bundle that includes a 'Digital Audio' motherboard, a dual 533Mhz CPU, a few ram pieces, and a 64MB graphics that I assume is the Geforce3. If I got a hold of this, not only would my processor become over twice as fast as my current one (220% the speed of the 'Sawtooth' 400 Mhz, according to benchmarks I found on the internet), the RAM would slightly increase to 1.5 GB (by combining my current RAM pieces and the ones I would obtain with this bundle), and the Geforce3 would simply put the Ati Rage to shame. Moreover, the motherboard is also a lot faster. My question is: will this be possible? As in, will I be able to fit the DA motherboard into my Sawtooth case (which I think is the same size), plug in my current drives (DVD-ROM + 2xIDE hard drives + ZIP drive), and swap some RAM around?