So I picked up a Power Mac G5 a few weeks ago. DP 2.7GHz 2005 model, 8GB of RAM, 500GB HDD. I was able to install the OS, but when I tried to run Software Update, it kept freezing. I cracked it open and noticed that there was some corrosion inside. AFAIK, the machine will still boot, but I don't want to fire it up until I fix the issue to avoid further problems. I think what is happening is the the processor is overheating and shutting down. I couldn't figure out how to get the cover that says "G5" off so I can't get pass that. I was reading that someone successfully converted a 2004 model to Air Cooled, but theirs was a 2.5GHz model. I have the Early-2005 2.7GHz model. Would it be possible to do the same thing or might I run into problems of heat due to the higher clock speed? Also, did they redesign the heat sinks?