I have a new mid-2009 iMac 24 inch 2.66GHz. I work in a quiet environment and most of the time the computer is idling along. iStat returns the following fan speeds: CPU 1200 HDD 1600 ODD 800 Even when I drive the iMac a bit harder - 100% CPU for an hour and a half - the temps only rise as follows: CPU 60 C Northbridge 68 C Power Supply 71 C and the fan speeds do not increase. I value silence, and it seems to be unnecessary for the fans to running at this speed when they are not needed most of the time - when the computer is not under any load. With the iMac everything is right in front of your face. I heard about iMac Fan Control and installed it, but there is no possibility to set lower-than-standard fan speeds, except for the HD which can be set to 1200 instead of 1600. However, the ODD minimum speed increases to 1000 from 800. If I don't find a fix for this I will be sending the iMac back to Apple, and will have to reluctantly step down to a new Mac mini. Can anybody help?