I received an iMac G5 the other day from a friend. However, the fans seem to go into crazy mode quite often. It starts out very quiet, then as soon as I start doing just about anything, they slowly ramp up to very loud levels. Watching a youtube video ramps it to max speeds in about 10 seconds. If I set the system performance to "reduced" under energy saver, the fans stay at a much lower speed. However, automatic and highest cause the fans to get really loud. Is this how the iMac G5's are supposed to sound? Its so annoying I can hear it from 2 rooms away. I remember reading reviews many years ago about how whisper quiet these iMacs were supposed to be. Or am I wrong?