Hey all, I've managed to come by an old Power Mac Dual Processor (DP) G5 1.8GHz A1047, and I've been taking it apart to clean it out and possibly upgrade it just for fun. My first question is about the RAM capacity. I've checked my model on three different web sites, and they all report different max RAM amounts. Everymac (8GB): http://goo.gl/hST3xI Apple Serial Info (4GB): http://goo.gl/y1u88M Powerbook Medic: (16GB): http://goo.gl/tc390P Second, is the CPU upgradable? Like to a 2.0 or 2.4? I don't think it is, because Apple made it difficult to upgrade the processors on these old machines, and I think I'd have to replace the mobo as well as the CPU in order to complete the upgrade, but I just wanted to be sure. Everymac also mentioned in the machine's Q&A that the CPU wasn't upgradable. Finally, how do I remove the bottom right cooling fan and heatsink cover? I checked out the iFixit guide (http://goo.gl/IEOazJ, but that seems to be for newer 2005 G5 Macs, not my older '03-'04. I seem to have 2.5mm hex screws securing it down, along with a phillips and possibly some Torx. Once I get that off, I can clean out the rear fan and heatsink assembly, as its pretty dusty in here! Other than that, I could just see myself upgrading the hard drive and a faster AGP card. They just don't build them like they used too!