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CPU Fan Speed Stuck

Last response: in CPUs
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November 4, 2012 7:08:44 PM

Hi, i have a problem with my cpu fan. It was working normally for 3 years but now today, out of no where it starts running at 100%. I restarted and also fully shut down. I even turned off the psu and it still is stuck. The fan is 3 pin and its super load and annoying. Any help?

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a c 78 à CPUs
November 4, 2012 7:13:49 PM

Most CPU fans nowadays are 4 pin, although most motherboards can run three-pin fans using their 4-pin headers.

Check that your BIOS is using "voltage" control and not PWM control for the CPU fan.
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a c 78 à CPUs
November 4, 2012 7:58:12 PM

It's either the fan or the motherboard.

Try plugging another fan into the header, or try plugging the suspect fan into a 3-pin header on another computer.
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November 4, 2012 11:46:50 PM

It was the fan, I plugged it into another motherboard I have and it was still at 100%. Thanks for the help.
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November 4, 2012 11:46:58 PM

Best answer selected by kkty5.
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