New 13 inch Macbook Air Fan Noise

Discussion in 'MacBook Air' started by jwkitche, Jul 21, 2011.

  1. macrumors newbie

    Joined:
    Feb 1, 2008
    Location:
    Kentucky
    #1
    Just got the i7 Air and the fan came on immediately. Loud and continuous. I have an 11 inch (prior model) that is dead silent. Also, my Macbook Pro (2010 17 inch) is dead silent.

    Is this a known issue with the air or is something wrong?
     
  2. macrumors 68030

    NutsNGum

    Joined:
    Jul 30, 2010
    Location:
    Glasgow, Scotland
    #2
    My i5 13" is as quiet as a mouse.
     
  3. macrumors 6502a

    Joined:
    Feb 3, 2011
    #3
  4. macrumors 6502

    Joined:
    Jan 8, 2011
    Location:
    United Kingdom
    #4
    I'm also having no noise problems at all with my i5 13" MBA
     
  5. macrumors member

    Joined:
    Oct 20, 2006
    #5
    Dead. Silent.
     
  6. macrumors 6502a

    Joined:
    Jul 17, 2011
    #6
    When I installed Lion yesterday the fans kicked on like crazy. Normally they only ever ran when I watched HD video via Youtube, iTunes, Hulu etc. With the lone exception being Amazon's video on demand service which never kicked on the fans. Apparently the fans had come on due to the indexing. Once that was completed, the fans are now seemingly back to normal but they do come on sooner than before when watching videos. But this probably has something to do with Apple's childish treatment of Flash in Lion. When your fans are on high like that, go into the activity monitor and see which program is using the most resources.
     
  7. macrumors 6502a

    Joined:
    Mar 30, 2011
    Location:
    NYC
    #7
    One of the main reasons I opted for the i5 instead of the i7.
     
  8. macrumors regular

    Joined:
    May 4, 2011
    Location:
    VA
    #8
    Have any other i7 buyers had problems with this?

    really need some help here

    Thanks,
    Swayne
     
  9. macrumors regular

    Joined:
    May 4, 2011
    Location:
    VA
    #9
    back to top, any more i7 experiences????
     
  10. macrumors member

    Joined:
    Mar 23, 2004
    #10
    My 11 inch i7 is all fan all the time. Uh oh. Cupertino, I think we have a problem.
     
  11. macrumors newbie

    Joined:
    Jul 7, 2011
    #11
    Higher CPU = more heat generated = more fans.

    I would be interested to see what everyone is using to do that. Like most I bet you're watching flash video's.
     
  12. macrumors 6502a

    tbobmccoy

    Joined:
    Jul 24, 2007
    Location:
    Austin, TX
    #12
    I am so much more comfortable with my slightly slower but quieter than a mouse i5 MacBook Air now. Maybe they'll find a firmware update, but I'm pleased enough with the i5 to not want to upgrade.
     
  13. macrumors newbie

    Joined:
    Jul 21, 2011
    Location:
    Copenhagen
    #13
    This thread is making me anxious about my i7 13", due to be delivered on August 4th :/ I had planned to underclock it but apparently Coolbook doesn't support SB.
     
  14. macrumors demi-god

    Joined:
    Oct 14, 2005
    Location:
    Virginia Beach
    #14
    Processes that are using a lot of the processor are what causes heat buildup which is what causes the fan to run.

    Anytime that happens, you can launch the Activity Monitor program, set it to show "All Processes", then sort it by the "% CPU" column. Simply look for the processes using the most CPU (as that's what's generating the heat).

    The first time you turn on a Mac (or upgrade an existing Mac to a new OS), Spotlight runs and indexes the drive. You won't see this process running in your Dock, but it can generate some heat, and take awhile to finish. So that might have been it.

    Either way, reboot your new Air, and if the fan starts running again, try the Activity Monitor thing and see what process is causing it.

    Something else you can do, if you don't want to wait for the fans to come on, is start the Activity Monitor application, then going into View > Dock Icon > Show CPU History. Then down on your Dock, you'll have a graph always showing you how busy your CPU is. Anytime it spikes (like in the example below), you can double-click on the Dock icon and see what's going on.
     

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  15. macrumors member

    Joined:
    Feb 27, 2011
    #15
    my fan hasn't started but I've only used safari. i got the i7 13in
     
  16. eeptman, Jul 21, 2011
    Last edited: Jul 21, 2011

    macrumors member

    Joined:
    Jul 21, 2011
    #16
    I got mine 13" i7 today from Apple Store. So far so good.

    My MBA stays around 45~52 C, but 7x~93 C while importing an movie into iMovie and the fan will start spinning to 6xxx rpm. However, it cools down to 4x C as quickly as job be done in 10 secs. The cooling system is efficient in this generation.
     
  17. rds
    macrumors regular

    Joined:
    Aug 9, 2007
    #17
    Open Activity Monitor (in Utilities folder) and select "All Processes" instead of "My Processes" in the toolbar. Then, sort by % CPU descending. I'd hazard a guess it's mdworker indexing for Spotlight.
     
  18. macrumors regular

    Joined:
    Aug 19, 2010
    #18
    It's probably spotlight indexing.
     
  19. thread starter macrumors newbie

    Joined:
    Feb 1, 2008
    Location:
    Kentucky
    #19
    Dropbox is syncing (for the first time on this machine) and using 40-115% CPU. kernel_task is using 11-20%.

    Interesting that the fan quieted down when I unplugged the machine.

    It is not a "deal-breaker" for the new MBA but just a surprise since I have not heard much fan noise since my first generation Air.

    It is warm but not scorching. Certainly better than prior Pros and the first generation Air.
     
  20. macrumors newbie

    Joined:
    Jul 19, 2011
    Location:
    uk
    #20
    same here Silent even when i tried a 1080p youtube test was quite silent
     
  21. macrumors 6502

    Joined:
    Oct 8, 2006
    #21
    Do you have a MBA i5 or i7 ?
     
  22. macrumors 65816

    Joined:
    May 7, 2009
    Location:
    Hamilton Island, Whitsundays, QLD Australia
    #22
    as already mentioned it's probably indexing or whatever, though it does seem unusual.

    you could try resetting the SMC first

    and then maybe run this sequence in Terminal, one line at a time:

    sudo chown root:admin /
    sudo kextcache -system-prelinked-kernel
    sudo kextcache -system-caches
     
  23. macrumors newbie

    Joined:
    Jul 19, 2011
    Location:
    uk
    #23
    13" baseline what a computer i like it even more than my 2010 mba 11:)
     
  24. macrumors 65816

    Joined:
    Jan 31, 2010
    #24
    Just purchased the 13" ultimate. I'll be testing this out. If it gets hot or too loud I'll be exchanging for i5. :mad:
     
  25. thread starter macrumors newbie

    Joined:
    Feb 1, 2008
    Location:
    Kentucky
    #25
    After finishing Dropbox sync - quiet as can be. Even when plugged in.
     

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