I was enjoying my quiet new mac until today -- disaster has struck!! This is not a G5 apparently! but is the new aluminium 24" iMac! Hardware Overview: Model Name: iMac Model Identifier: iMac7,1 Processor Name: Intel Core 2 Duo Processor Speed: 2.8 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache (per processor): 4 MB Memory: 4 GB I have a new problem my Imac is only a few weeks old . Turned it on today after being completely off over night (with power supply off also) and the moment I touch the on button the fan kicks in full blast and never NEVER goes off - every time now - its a problem! Will get my apple care on it on Monday but is this a common problem? The fan has never come on before what ever I do! devastated this was the quietest machine ever!