So, I have the latest 2.5 G5 quad. The power supply recently blew on it so I had the local Apple shop replace it. I brought her back home and powered her up for the first time and the fans are on full blast the whole time. Usually the fans would be on high during start up and while shutting down...but they would ALWAYS slow down when OS X is loaded. Now they are on high all the time. specs: 2.5 quad, 6.5 gb RAM, 2x 500gb HDD's, GeForce 7800GT, 10.5.6 (I know 10.5.7 is out...I'm installing it tonight, as it took over an hour to install on my iMac's) I know I can just take it back to the tech, but if I can fix it with a simple setting then I'd like to try that first. Let me know...thanks!