Do your fans turn on when watching HD movie streams?

Discussion in 'MacBook Air' started by coldjeanzzz, Jan 2, 2014.

  1. coldjeanzzz macrumors 6502a

    Nov 4, 2012
    Whenever I watch HD quality stuff on Amazon prime the fans will turn on and run sort of loudly. Usually they aren't audible but these videos seem to tax it quite a bit and I was wondering if that's normal? The top left of the keyboard also gets quite hot.

    Running on a 2012 MBA i5 8 GB RAM
  2. robvas macrumors 68030

    Mar 29, 2009
    Depends on what site I'm playing them from and how they are encoded.

    Computers get hotter and the fans will come on if they are under heavy use - the CPU will throttle down if it overheats, you don't have to worry about damage.
  3. Steve121178 macrumors 601


    Apr 13, 2010
    Bedfordshire, UK
    Totally normal. It will even heat up watching regular YouTube videos.
  4. gnasher729 macrumors P6


    Nov 25, 2005
    Movies in h.264 format are decoded in hardware and shouldn't heat up your computer a lot. Movies in other formats like MPEG are decoded in software and heat up the computer a lot. Now we'd need to know what you mean by "sort of loudly". I would expect "I can hear the fans" in the first case and "I can hear the fans quite loudly" in the second case.

    Run "Activity Monitor", it will tell you how much CPU each application uses. MPEG videos could easily use 150% CPU, while h.264 movies should use a lot less.
  5. kage207 macrumors 6502a

    Jul 23, 2008
    Netflix for me is about 50/50, sometimes it will never turn on and sometimes it will be on. Just depends on the delivery method of the video.
  6. Sarhir macrumors newbie

    Jul 1, 2009
    Scottsdale, AZ
    Streaming Movies

    I am thinking about getting a MacBook Air. One of the things I would like to do is watch movies on it. If I subscribe to Netflix I understand I can "stream" movies. Here is the question; do I have to be connected to the internet the entire time I watch the movie? or can I just "download" the movie and watch it later?

    I don't have internet where I live currently. Will be traveling soon and would like to be able to watch movies on the plane, or wherever I am.

    I am considering the 13" model with 4 GB of memory and 256 GB of flash storage.

    Second question: any recommendations on an external cd/dvd drive?


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