psu question..

[pauloh22]

do psu's use common ground, or do they have a seperate ground for 12v, 5v, and 3.3v?

thanks ~ paul

[rangeral]

0 V: Zero volts is the ground of the PC's electrical system, also sometimes called common or earth. The ground signals provided by the power supply are used to complete circuits with the other voltages. They provide a plane of reference against which other voltages are measured.

[lito pospos]

some power supply design positive and negative out put are not common with respect to ground