How to control fan speed with hwinfo

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I can also now hear the fan and it's keeps ramping up and down. I've a tiny Dell OptiPlex 3080 desktop (i5-10500T) whose BIOS I recently upgraded (1.3.1->1.3.2) and all of a sudden the fan's RPMs changed from 805rpm to 1800rpm.

First thanks for providing HWINFO - the issue below I'm describing is mitigated HWINFO fan control utility.

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