What happens if I do not plug it into the motherboard and it does not have a switch?
I have seen fans before with an "off/low/high" switch that allows you to manually set their speed.
I have seen fans that plug into the motherboard and are controlled by the OS.
I am curious... what does a fan do by default when plugged into a PSU? Does it run at 100% unless otherwise told to go slower? This is what I would expect...