GPU fan behaviour (fan tachometer RPM)

[tautvydas]

so i bough a card recently and noiticed that when the temps are low the fans dont spin, so no big deali thought.

what i notiiced though that fan tachometer reports that when the load is small and the fan runs at 2+% according to MSI afterburner, it keeps jumping from 0 to 800 to 0 too 930 to 0 to whatver. that is only however under a small load.
if i put some real load like furmark, when gpu gets hotter it seems to stop doing that. the question would be is that expected behaviour or is something not right ?

i'm using GALAX GeForce® RTX 2070 Super EX (1-Click OC), not new so i'm guessing if i got sold a defective one or not

[Raudi_]

2 minutes ago, tautvydas said:

so i bough a card recently and noiticed that when the temps are low the fans dont spin, so no big deali thought.

what i notiiced though that fan tachometer reports that when the load is small and the fan runs at 2+% according to MSI afterburner, it keeps jumping from 0 to 800 to 0 too 930 to 0 to whatver. that is only however under a small load.
if i put some real load like furmark, when gpu gets hotter it seems to stop doing that. the question would be is that expected behaviour or is something not right ?

i'm using GALAX GeForce® RTX 2070 Super EX (1-Click OC), not new so i'm guessing if i got sold a defective one or not

Normal, card has a 0db fan mode so the fan is off under 60C 

[tautvydas]

3 minutes ago, KingCry said:

Normal, card has a 0db fan mode so the fan is off under 60C 

yeah that makes sense, but i'm more concerned that when its under light load ~55 C, my fan tachometers keeps jumping from 0 to 1000 RPM or somehwere in between, does that not harm it ? the % graph is smooth, but the tachometer line is like a mountain view

[Raudi_]

4 minutes ago, tautvydas said:

yeah that makes sense, but i'm more concerned that when its under light load ~55 C, my fan tachometers keeps jumping from 0 to 1000 RPM or somehwere in between, does that not harm it ? the % graph is smooth, but the tachometer line is like a mountain view

It will do no harm, you can always set a custom fan curve to stop it from doing that.

[tautvydas]

On 10/1/2022 at 2:26 PM, Raudi_ said:

It will do no harm, you can always set a custom fan curve to stop it from doing that.

i suppose the fans cant spin at such consistent low rpm to keep the 1-10% fan speed so they need to pulsate, but if it is not damaging i guess thats allright.

tried to run them at come low rpm mode, but it keeps fluctuating anyway, only somewhere around 32-34% they stay on ~940 RPM on constantly, going lower it just flucuiates less often