Hello all, I am curious to get some feedback in regards to CPU temperature of the PowerMac G5s out there and whether or not I have an issue with my machine and should take it in to the Apple Store. I have my processor performance set to 'Highest' to minimize the fans going into overdrive (aka 'takeoff mode!"). At idle, my CPU temps read: CPU A: 57.2/135.0 (ºC/ºF) CPU B: 69.6/156.2 (ºC/ºF) However, if I start taxing the system they jump up considerably, and there is an even greater gap between CPU B's temp over CPU A. These are the extremes I have gotten when running the processors at 100%: CPU A: 64.4/148.0 (ºC/ºF) CPU B: 88.7/191.7 (ºC/ºF) As you see, it jumped from 12ºC warmer up to 24ºC. Is this a serious issue to worry about? I have cleaned out the case and checked for any coolant leaks of which there are none visible. From other research online, it seems normal for the temps to be off +/-5ºC, usually with A being warmer than B. Would a Thermal Re-calibration at the Genius Bar help things? I would just like to check others experiences and see if this is something I should pay closer attention to and in more detail.