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    Dell BIOS fan control.

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by matchbox2022, Nov 15, 2015.

  1. matchbox2022

    matchbox2022 Notebook Enthusiast

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    So,
    I haven't been here in forever.
    But since discovering this and achieving way better temps now than ever, I thought it best to pay it forward
    But in the thread
    Problem with Dell Inspiron E1705
    I thought I'd post a solution which may work for a whole lot of people....thread is closed now unfortunately.
    Perhaps only until 2009 (I believe dell changed the password or entry since then) if you have a laptop which predates that, you CAN
    indeed
    Take manual BIOS control of the fans.
    You can either do a reset of the temperature monitoring by pressing Fn + Z and holding both then letting go.
    OR
    Hold Fn + Shift, and while holding, enter 1 5 3 2 4 on your keyboard.
    You should have a light flash to establish an engineering mode of sorts has engaged.
    There's all sorts of goodies open now, but to engage temp controls,
    Now hold Fn + R.
    You will enter a screen where you can adjust settings as you wish.
    The Fan RPM works as PWM and goes from 00 to FF for 0% to 100% (actual, emergency cooling or overclocking 100%)
    This likely won't work for newer laptops, but I think older ones, maybe only up to 2008 this should still work.

    ** DO FOR THE LOVE OF GOD** not turn off bios thermal control then proceed to turn off your fans and walk away. The CPU will still thermal trip and reset the computer, but you will likely damage the gpu permanently by doing so.

    That said, this is an excellent way for you to have 110% control of your systems cooling.

    Long time coming but hey if software isn't working for you, this will.

    If you have a dell laptop please post if it worked or not, I personally would love to know up to what year it works since I'll be getting a dell based on my ability to control it.
     
  2. King of Interns

    King of Interns Simply a laptop enthusiast

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    Well the m15x (dellienware) Hwinfo works to manually control fans. Quite a few other Alienware laptops from 2009 onwards work this way.
     
  3. jedisurfer1

    jedisurfer1 Notebook Deity

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    Does this work on latitudes? I've tried on an e7240 with no luck
     
  4. bennni

    bennni Notebook Evangelist

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    No luck with Hwinfo or other software fan controllers on the Latitude E6410.

    Tried the key combination and while it does make the scroll lock key flash (Which suggests it is in some sort of developer mode), pressing fn+f doesn't bring up a menu of any sort. No real problem but it would be nice to have some sort of control over the fans.
     
  5. matchbox2022

    matchbox2022 Notebook Enthusiast

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    why are you using Fn + f? It is Fn R, but it may depend on the edition so just start hammering keys. Fn Shift + Random keys too.