Besides, do GPU fans turn on and off?
Yes, start/stopping of fans creates additional wear. Much like with engines, the lubrication the first few turns and precession forces during acceleration put extra strain on the bearing.
Likewise, how do I make my GPU fan run all the time? Click the "GPU" icon, and then click the "Cooling" slider control and slide it to a value between zero and 100 percent. The fan slows down or speeds up automatically, depending on your setting.
Considering this, is it bad to run your GPU fan at 100 all the time?
Running GPU fans at max for hours at a time while gaming won't do any real harm, aside from increasing their energy consumption and noise output. It's arguably preferable to burn out relatively cheap fans to extend the lifespan of the costly parts they're designed to cool.
How do I know if my GPU fan is working?
To verify if the problem with the fans resides in the power supply, one effective test is to connect the motherboard (That includes the GPU) to another power source. If the fans turn on, the problem then is located in the Power Supply Unit (PSU) of the original Laptop or Desktop.
