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nvidia 8400 aux2 fan speed

anoffdayanoffday To be changed whenever Anoffday gets around to it.Registered User regular
edited March 2009 in Help / Advice Forum
I'm using nmonitor, and for some reason it always says that the aux2 fan is always at 18rpm. That seems really low, and I've been having overheating problems with the card. I also have the Ntune thing installed, but the box to control fan speed is grayed out, so I can't change it or do anything with it.

Anyone know what I need to do to turn the fan up? Or am I totally off and the 18rpm thing is normal?

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Posts

  • NastymanNastyman Registered User regular
    edited March 2009
    18 rpm? Is that rotations per minute? If so that is incredibly slow. I can spin in circles faster than that and I'm not moving much air at all. I think that little thing needs to be spinning much faster.

    Also, is it an EVGA card? I googled a little and found a similar thread on another forum and somebody suggested http://www.evga.com/precision/

    edit: I think that works even if it isn't an EVGA card, found the same thing on a yahoo answers and it was the best answer

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  • anoffdayanoffday To be changed whenever Anoffday gets around to it. Registered User regular
    edited March 2009
    Nastyman wrote: »
    18 rpm? Is that rotations per minute? If so that is incredibly slow. I can spin in circles faster than that and I'm not moving much air at all. I think that little thing needs to be spinning much faster.

    Also, is it an EVGA card? I googled a little and found a similar thread on another forum and somebody suggested http://www.evga.com/precision/

    edit: I think that works even if it isn't an EVGA card, found the same thing on a yahoo answers and it was the best answer
    Thanks for the reply, but I've tried using that before. It's grayed out just like the Ntuner thing is.

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  • AtomBombAtomBomb Registered User regular
    edited March 2009
    If there are only 2 wires coming off of the fan to the card there is no way that you can measure how fast it is going (with software). You need at least 3 to do that. The picture I found of an 8400 only had 2 wires.

    If it was only spinning at 18rpm you would be able to see it with the naked eye.

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  • DmanDman Registered User regular
    edited March 2009
    Yeah 18 RPM is really slow, thats ~3 seconds per rotation....soooo slooow. Look at your fan and see how fast it seems to be spinning and if it wobbling or making funny noise or anything. I'm betting the reported fan speed is wrong but that doesn't mean your fan isn't broken.

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  • KurrelKurrel Registered User regular
    edited March 2009
    RivaTuner has been the kindest to me. My nVidia card has a BIOS-activated temperature control that constantly tries to keep my fan speed down. Using RivaTuner, I can force full power (the only way speed is controlled) to the fan for certain temperature ranges. Also, as it can monitor/control what % of full power is going to the fan, you can monitor/control the fan speed without that third, yellow wire.

    SCIENCE!

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  • InfidelInfidel Heretic Registered User regular
    edited March 2009
    Kurrel wrote: »
    Also, as it can monitor/control what % of full power is going to the fan, you can monitor/control the fan speed without that third, yellow wire.

    SCIENCE!

    That's known as an open loop control system, which is definitely not monitoring the fan speed. It just guesses, which is bad! :) The fan could be seized and not spinning at all, even if you're applying full power, which is a bad situation to be in.

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  • KurrelKurrel Registered User regular
    edited March 2009
    If the fan seized, wouldn't the temperature spike and the auto controls do the same thing?

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  • InfidelInfidel Heretic Registered User regular
    edited March 2009
    And it knows the fan seized how?

    We replace hardware thats just buggered because the user never did anything about a non-running fan until things started outright dying on them. The temperature is not an indication of fan speed, and sending out more juice to the fan due to high temperature isn't going to help when the fan is broken and no one knows.

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  • KurrelKurrel Registered User regular
    edited March 2009
    What I'm asking is how my system is worse than the BIOS, which does the same thing except maxes out at 30% power, even if the GPU core is 95ºC. I would think if the fan seized the only way it would be obvious is by the sudden increase in average temperature, at any load.

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  • InfidelInfidel Heretic Registered User regular
    edited March 2009
    I'm just pointing out the SCIENCE behind the yellow wire is not magic but open vs closed loop, which is a big difference. :)

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