[ubuntu] Fan running too much

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http://ubuntuforums.org – To start with, I am an absolute beginner in Linux. I just stepped over from Windows to Linux as I got enough of virusses and malware. When running my Windows, I almost got no noise from the fan. Only at start-up or when running a heavy application the fan was a bit louder. When running Linux, the fan runs very loud all the time, even if no application is running. In another topic I have read that it has to do with the motherboard-driver installed at Linux. See http://ubuntuforums.org/showthread.php?t=1245562 My motherboard is ASUS P5B-E. Please can somebody help me out, telling me step by step what I shoud do to fix this? I even do not know where to find the motherboard-driver....:oops: Thank you. (Hardware)