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Cooling fan in PC start very fast. Is there any chance of it's failure due to resonance? In opposite, ceiling fan starts very slow, why doesn't it fail by resonance? Does regulator have any arrangement for crossing resonant speed quickly. Same question applies to cooling fan, how designer ensures it never stay at critical speed.

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  • $\begingroup$ is the working rpm range lower than the critical speed? $\endgroup$
    – Solar Mike
    Feb 14 at 17:42
  • $\begingroup$ Is there any chance? ... there is always a chance ... it may be almost non-existent, but it's there $\endgroup$
    – jsotola
    Feb 14 at 18:32
  • $\begingroup$ My pc is an old top-notch pc from 2014 with so many programs installed that make moving on to a new PC a horror. last 3 years when I start to put an extra processing load on the CPU, and GPU, the fan vibrates wildly and makes a screeching, grinding noise. sofar a tap has been able to stop the resonance! or i just remove the load from GPU. $\endgroup$
    – kamran
    Feb 14 at 19:11
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    $\begingroup$ @kamran that is bad bearings, not natural resonance $\endgroup$
    – jsotola
    Feb 14 at 20:15
  • $\begingroup$ I agree with @jsotola. PC fans almost always fail because of bearings. "Screeching, grinding noise" is what it usually sounds like. $\endgroup$
    – Eric S
    Feb 15 at 1:23

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