Fan RPM spiking?

[Koshigaya]

This has been going on for awhile now and I think either my GPU or my PSU are dying. Ever few seconds I'll hear a rumbling noise coming from the GPU, and the fans on the GPU will spin up then back down. The RPMs are shoo ting from 0 to the 900s. If you look at the fan tachometer you can see it spiking. The fans aren't supposed to be spinning at all when not under a load. Any idea what could be the issue?

[Rallenhayestime]

900rpm isn't bad at all... my gpu idles at 1200rpm. You are using a very old version of msi afterburner, so it's hard to read. I would say that it's your psu fan spinning because 900rpm is literally nothing.

[Koshigaya]

1 minute ago, Rallenhayestime said:

900rpm isn't bad at all... my gpu idles at 1200rpm. You are using a very old version of msi afterburner, so it's hard to read. I would say that it's your psu fan spinning because 900rpm is literally nothing.

Huh? I know 900rpm isn't bad. And this is a reading for the GPU, not PSU. What is bad though is that it spikes from 0 -> 900~ -> 0 -> 900~ constantly, and very rapidly. It's not supposed to do that.

This is the latest version of afterburner, I just prefer the old skin.

[Rallenhayestime]

Try setting fan speed to 25% and post a pic of the tacho then.

[Koshigaya]

31 minutes ago, Rallenhayestime said:

Try setting fan speed to 25% and post a pic of the tacho then.

Setting it to 25% stops the spiking and it's RPMs are consistent. But it shouldn't be spiking at all.

[Rallenhayestime]

That's what I was getting at. Try this. Watch the auto fan speed and you'll see the rpms spike while the auto fan speed rises. That's just how gpus keep cool.

[Koshigaya]

It's not supposed to spike like that lol. It spins up then instantly stops, and spins right back up and instantly stops again.

[Leanora]

What's the temp and what is it doing? 

if not already done so, can you reset to factory defaults and let us know what the fan is doing then ?