Can someone please give me an idea of what is a normal level of fan noise? I find the fan noise obtrusive. It's noticeable even when I am listening to a dvd or Youtube with headphones. It occurs even with only one app running like Photo Booth or Word or any website with video or audio. Any suggested fixes would be much appreciated. My friend who has the same model doesn't have any fan noise so I'm wondering what the problem is. I told the Apple Store and they replaced it but it's made no difference. The Genius Bar operative @ Buchanan Street in Glasgow was extraordinarily unhelpful, so I complained to the manager who said we can try and find a solution but honestly I feel really put off going back there in a hurrah after the contempt I was treated with for daring to ask what was wrong. I have checked activity monitor frequently and it doesn't seem to be running particularly high for any one thing. However can someone confirm what is a normal level of cpu per item and overall?