I have a 120mm Rosewill in the front of my case for intake. I want to run it at its max 12V when gaming and then 5V for everything else. I have a toggle switch that's made for a car:
I know "earth" is ground, supply is the power source and load is the object the power is powering, but can i run the fan at 5V and then turn the 12V circuit on with the switch? Or will it add both and make it 17V or will the higher voltage just take over?
Diagram:
If this won't work, then can I just use the yellow 12V circuit with the switch and turn the fan off or run on 12V as my only options?
Thanks

I know "earth" is ground, supply is the power source and load is the object the power is powering, but can i run the fan at 5V and then turn the 12V circuit on with the switch? Or will it add both and make it 17V or will the higher voltage just take over?
Diagram:

If this won't work, then can I just use the yellow 12V circuit with the switch and turn the fan off or run on 12V as my only options?
Thanks