GPU fan won't run below 84% RPM

Kaiju

Kaiju

Kaiju

Soldato
Joined
27 Jan 2005
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Expat in HK
I have a MSI GTX660 and only recently cleaned out my PC to find the GPU had accumulated a lot of dust underneath the fan.

I looked in Afterburner and messed around with the fan curve to find it wouldn't run anything below 84% RPM.

For example, if you check out the image, the fan won't actually turn on until around the 55C temperature. Anything below 55C and the fan won't actually spin!



I then tried different temperatures to find it roughly doesn't spin on any RPM below 84%.

Any ideas?

I already changed the BIOS back to stock and cleaned out all the dust.

The fan runs at 4650RPM when on full load and throttles down to 0RPM once it goes below 55C.
 
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Kaiju said:
I have a MSI GTX660 and only recently cleaned out my PC to find the GPU had accumulated a lot of dust underneath the fan.

I looked in Afterburner and messed around with the fan curve to find it wouldn't run anything below 84% RPM.

For example, if you check out the image, the fan won't actually turn on until around the 55C temperature. Anything below 55C and the fan won't actually spin!



I then tried different temperatures to find it roughly doesn't spin on any RPM below 84%.

Any ideas?

I already changed the BIOS back to stock and cleaned out all the dust.

The fan runs at 4650RPM when on full load and throttles down to 0RPM once it goes below 55C.
Click to expand...

download speedfan 4.51 and try that. its free and you can set it in there
 
Thanks but it didn't allow me to change the GPU fan. I went to Configure/Advanced but there wasn't the option to add the GPU fan and none of the PWM fan controls change anything.
 
so you set the rpm percentage and its basically gone from off to nearly full in one jump?

Sounds like the bearings are going or something is creating extra resistance around the fan.

I'm not a big expert on how exactly fans work internally but I have seen on cheap fans that as they get older they start to "Seize" and need a lot more force to turn, eventually of course they overloads the motor and burns them out.

Not sure that helps.
 
Got to agree with the above. If you take the card out and spin the fan manually does it spin freely or can you tell there's resistance?
 
Well, well, well. I had the fan running on 100% for 2 days and now the fan works. VK, Pie, you were right. I think running it at 100% loosened the extra resistance.

Thanks guys!
 
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