If you connect the 12Vdc and -12Vdc on a desktop PSU do you get 24 Volts?
I used to understand more about electricity and electronics, i swear.
I have used the yellow-to-red (+12 to +5 Vdc) method to create 7 volt dc connections for my desktop and xbox fans. I understand the concept of differences in voltage.
Do these concepts carry over into negative voltage available on the ATX power supplies?