I've been having a problem with the fans with my 11" i7 that I've gotten 4 days ago. I'm running a 27" cinema display, I don't much CPU intensive and my CPU is usually 95% idle and fans are usually quiet. Every time I start doing something more CPU intensive like running iTunes visualiser or run handbrake the fans start spinning a lot faster, often up to its 6500rpm max. The problem is not that the fans start running, but the time it takes for them to ramp down to their base 2000rpm after the CPU intensive task is done and the CPU has cooled off already. Fans just keep on spinning fast until I leave it completely idle for a about 10-15 minutes. It has something to do with the room temperature at the location where I primarily use my macbook, which is in the attic of my house where it gets quite hot (30-35c) on warm days like today. In order to test this hypothesis I set up a fan behind to computer to feed it some cool air. Fans were spinning at 6500rpm before setting up the external fan and afterwards they instantly started to slowly but steadily ramp down to 2000rpm again. Although it is good news that I sort of figured out the source of my problem, the question remains whether it is normal for a computer to take a very long time to ramp down the fans after finishing a CPU intensive task and having cooled off internally already (according to iStat), but while getting fed warm air. Please note that this only happens after doing a CPU intensive task. If I don't do anything CPU intensive all day, the hot air doesn't bother my computer at all. Any ideas whether the effect air temperature has on my MBA is normal?