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Default fan curve hysteresis/oscillation 3080 FTW3 Ultra

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davidgiga1993
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2020/10/19 10:56:09 (permalink)
Hello,
 
I'm a long time EVGA user and just upgraded from a 1080 to 3080 a couple of weeks ago.
I've noticed that the default fan curve has either no hysteresis or a strange ramp up. During lightweight usage (e.g. desktop or old games) the fans ramp up for one second to a high rpm and stops again. This happens every couple of seconds which makes an annoying noise.
Here is a picture of the data. Note that the temperature is constant (+-1C). 
Is this a know issue? Is there some future bios updates to tweak/fix this issue? 
 

 
The custom fan control in precision works, but I can't use it constantly for fan control since I have some low latency applications where this can mess up other stuff.

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#1

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    sinewave
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    Re: Default fan curve hysteresis/oscillation 3080 FTW3 Ultra 2020/10/19 11:02:56 (permalink)
    not the answer you're looking for, but Afterburner has hysteresis for custom fan curves and it works great with a setting of 5c. lovely feature!

    CPU: 9700k @4.8ghz
    GPU: 3080 XC3 Ultra
    PSU: Corsair RM850X
    RAM: 2x16gb G.Skill TridentZ
    SSD: Samsung 970 Evo 1 TB
    MOBO: Asus Z390-i
    CASE: Corsair Crystal 280X
    #2
    notarjy
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    Re: Default fan curve hysteresis/oscillation 3080 FTW3 Ultra 2020/10/19 11:04:30 (permalink)
    Have you tried setting the bios switch on the card to OC mode? this loads an alternative fan profile from bios without needing PX1 running, and it does not stop the fans at idle so should hopefully solve your hysteresis issue

    9700k @ 5.0Ghz 1.3v AVX0
    EVGA RTX 3080 FTW3 Ultra
    #3
    davidgiga1993
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    Re: Default fan curve hysteresis/oscillation 3080 FTW3 Ultra 2020/10/19 11:07:13 (permalink)
    sinewave
    not the answer you're looking for, but Afterburner has hysteresis for custom fan curves and it works great with a setting of 5c. lovely feature!


    Precision also has hysteresis, my issue is that the default fan control of the GPU doesn't seem to work properly up to some point.
    Sometimes the fan control starts to work "regularly" but also with spikes:



    notarjy
    Have you tried setting the bios switch on the card to OC mode? this loads an alternative fan profile from bios without needing PX1 running, and it does not stop the fans at idle so should hopefully solve your hysteresis issue

    Ah good idea! Yes I've just tried that but the idle fan speed is too high (aka too loud) for my taste, which is fine I mean it's OC mode.

    I would really like it if the default mode would behave as my 1080 did where the fans turn off by default and ramp up linearly, not in short bursts.
    post edited by davidgiga1993 - 2020/10/19 11:28:50

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    Sajin
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    Re: Default fan curve hysteresis/oscillation 3080 FTW3 Ultra 2020/10/20 12:01:16 (permalink)
    Just run the fans at a static speed. Problem solved.


    See my current build here: https://forums.evga.com/My-bench-rig-unlimited-power-m3596024.aspx
    RTX 2080 Ti 4-way SLI?!?!: https://forums.evga.com/RTX-2080-Ti-4way-SLi-set-by-yours-truly-m2954756.aspx
    #5
    Archvile82
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    Re: Default fan curve hysteresis/oscillation 3080 FTW3 Ultra 2020/10/21 20:07:04 (permalink)
    I had this problem using the normal mode bios but switching over to OC fixed it. I actually don't mind as I can barely hear the fans in my case and card temps went from 50 down to 32 at idle.
    #6
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