I installed SpeedFan, but the only fan showing up is the one inside my laptop for the CPU.

Since today, I have an additional fan which is external below the Fellowes® - Precision Cooler Laptop Riser.

How can I regulate the fan speed of this external fan which is plugged into my laptop via USB?


You can't. USB only powers it. There's no data interchange. You can't lower the voltage on the usb.

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