i have a 21.5inch imac 2011. it seems to be have a problem with sleep mode. it's appeared to be operating at more high speed than default value, after i awake it by pressing esc button. before sleeping it works at default value 1200 rpm. but after awakening from sleep, smc fancontrol show me that it's working at about 1300 or more high speed and then goes to normal state 1200 rpm in a few second. i think there are two possibilities. first is sleep function works abnormally. second is that smc fancontrol utility detect incorrectly specifically when awakening from sleep. what about yours?