I just want to do a little fan test from other iMac G5 Rev. B owners. 1) Just have Safari, iTunes, quicktime,and mail open. 2) Then download the widget called: iStat Pro. 3) Now there will be a "temps" and "fans" section. post what your temp is at and what your fans RPM are at that temp, with those above apps open. I just want to see if my fan RPM is higher than it should be at a certain temp. Don't test this after you have been working your CPUs butt off because it will be hotter than regular and screw up the test. Thanks!!