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    Fan turns on when plugged in (9550)

    Discussion in 'Dell XPS and Studio XPS' started by con5tant, Jan 17, 2016.

  1. con5tant

    con5tant Newbie

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    This is my second XPS 15 9550, the first one had a similar issue where the CPU fan would turn on and run full speed when plugged in (up until about 80% then it would shut off). On this unit, when it is plugged in, another fan turns on but it's much quieter. I'm guessing it's a GPU fan? Does the CPU fan only have 1 speed? When it is unplugged the laptop the fan turns off.


    I have all current video drivers and BIOS and all power settings are set to passive. Is this a hardware defect and should I return it for a 3rd unit?
     
    con5tant, Jan 17, 2016
    #1
  2. Xeonized

    Xeonized Newbie

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    Have you found solution to it?
     
    Xeonized, Feb 14, 2016
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  3. con5tant

    con5tant Newbie

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    Apparently this is normal
     
    con5tant, Feb 14, 2016
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  4. GoNz0

    GoNz0 Notebook Virtuoso

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    you will find both fans spin at the same speed regardless of CPU or GPU as it works best with a combined heatpipe. the only time they spin at different speeds is during the diagnostics!

    they run the lowest speed while the laptops delivering a full charge and shut off as the charge rate drops during the final 20%
     
    GoNz0, Feb 15, 2016
    #4