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Faulty fan?

TristanN
By TristanN
in Troubleshooting
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Hi,

 

one of the three fans that came with my case (P500A) keeps jumping to 2000+ RPM and will sometimes drop to 0 RPM. It should be running at 1000RPM consistently according to my fan curve. The other two fans are working fine. I have tried attaching the fan to a different fan header but still have the same issue.

 

It's a 3 pin fan so I have set on DC, temp source is system, and I have attached a photo of the fan curve.

 

Is the fan faulty?

 

Thanks

IMG_4795 2.jpeg

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Posted

As far as I know you need 4pin pwm connectors to enable to use of fan curves. Otherwise they will run at max speed.

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18 minutes ago, emosun said:

is the fan itself actually doing that or just the rpm sensor?

Looking at the fan it seems fine, would I be able to tell if it dropped to 0 RPM for a millisecond? And would the RPM sensor be on the mobo or the fan? Thanks I'm a noob.

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16 minutes ago, fuzz0r said:

As far as I know you need 4pin pwm connectors to enable to use of fan curves. Otherwise they will run at max speed.

The other 2 fans work fine with a fan curve, I think it just modulates the voltage to adjust the RPM, PWM just gives finer control

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