[SOLVED] Constantly changing fan speeds

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Hi guys and gals


I have a rather annoying problem. The fans within my unraid server are cycling from slow to fast every 5 or 6 seconds. This starts just prior to unraid booting and when going faster it is loud. 


Hoping someone can help? My setup is as per below, thanks!


CPU: Intel® Xeon® Processor E3-1241v3 (8M Cache, 3.50 GHz)

Cooler master fitted to above

Motherboard: Supermicro X10SL7-F

Memory: 2 x Crucial 16GB Kit (8GBx2) DDR3/DDR3L-1600MT/s (PC3-12800) DR x8 ECC UDIMM Server Memory CT2KIT102472BD160B/CT2CP102472BD160B

PSU: Corsair HX850i 80 Plus Platinum 850W Power Supply

Case: Fractal Design Define R5 Mid Tower Black

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As far as I understand, you can only link the fan speed to one temperature sensor, I chose the drives temperature but depending of your need I think you can adapt.


On the Fan Control tab you can select the drives you want to use ( I only check HDDs, not SSDs that have separate cooling ).

Then set your temp thresholds and the corresponding fan speeds.



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  • JorgeB changed the title to [SOLVED] Constantly changing fan speeds

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