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Unusual GPU fan speed spikes

Hi all,

A few weeks back my MSI N770 lightning's fans started spiking for no reason even when my computer was on idle. Here's a SS from my Afterburner readout: http://imgur.com/os4vFI0

The Nvidia drivers in SS are an old version as I was trying to see if rolling back my drivers would work, but no matter which version I use (including the latest one) the problem still persists. Have never overclocked my video card.

I've tried also:

- Checking the card/fans for dust build up and reconnecting the power supply to the fans.

- Different settings on Afterburner, turning off auto fan control, turning on user fan profile, setting the fan speed at 100% and then back, setting everything to it's lowest possible value.

- Uninstalling and reinstalling Nvidia Drivers. Uninstalling all the extra Nvidia stuff (HD audio/3D etc.) leaving just the video card drivers. Rolling back to older drivers.

My System Specs:

Windows 7 64-bit
i5 4670
Asus z87-a
8GB RAM (Corsair vengeance)
Seasonic x850

If anyone has experience with this problem or know what I should do, your advice would be greatly appreciated! Thank you for your time.
5 answers Last reply Best Answer
More about unusual gpu fan speed spikes
  1. Try enabling user defined software automatic fan control in the afterburner settings, see if the problem goes away.

    Set a proportional fanspeed to temperature starting at say 35% for 40degrees and ending at 100% at 75 degrees.
  2. sunder25 said:
    Try enabling user defined software automatic fan control in the afterburner settings, see if the problem goes away.

    Set a proportional fanspeed to temperature starting at say 35% for 40degrees and ending at 100% at 75 degrees.


    Thanks for fast reply. Unfortunately I've already tried that, the fan speed % follows accordingly but the RPM still constantly spikes.
  3. Best answer
    It might be a problem with the fan's voltage regulator then.
    You may have to return the card for warranty.
    Try it in another computer if available to make sure the problem is card-related.
  4. sunder25 said:
    It might be a problem with the fan's voltage regulator then.
    You may have to return the card for warranty.
    Try it in another computer if available to make sure the problem is card-related.


    Hmm, it's as I feared. Unfortunately I don't have another computer to test it, I might have to bring it back to the shop.
    Ok, thanks for the advice!
  5. Good luck with your card, glad to help.
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