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X570/3950X Fans Revving Up

The fans rev up at full speed for about 15-20 seconds like when opening a browser or just idle. I'm running latest bios and have altered the fan setting but its not fixing the issue. I havent tried replacing/reseating the cooler yet. Temps are Fine. What could be causing the issue?

 

  •     3950x (Noctua Paste applied)
  •     Aorus X570 AORUS MASTER
  •     EVGA GeForce RTX 2080 Ti
  •     Fractal Design Define R6
  •     noctua NH-D15
  •     Corsair RM750x
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Maybe your fan speed is too low, I've experienced that with some artic fans once, as soon as the PWM signal went under 5% Speed they ramped up to 100% don't know why but some fans seem to do that.

 

Also maybe your fan tacho signal is bad, can be because of EMF or defective fans, when your motherboard notices some akward fans speed it tries to compensate that somehow.

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