Hello I have a 1st gen 1.6G PPC G5 running 10.5.8 and have loved it since Day 1. Almost the only thing ever running is Camino with 4 or 5 tabs, but the fan noise is now driving me mad. CPU fan often goes over 5000 RPM and it's so annoying. Screenshot of iStat readings here: http://tinypic.com/r/zwm3aw/6 I've seen a lot of suggestions, but wondering in what order one should proceed to eliminate this problem. Don't really WANT to buy a new machine but may have to... any help much appreciated.