A switched-mode power supply (SMPS) is an electrical circuit that converts desktop SMPS power output circuits using switching devices. Those devices are turned on and off at high frequencies, and storage components such as inductors or capacitors supply power when the switching device is in its own, conduction state in the desktop SMPS power output circuit.
PS-ON# SMPS Power Output Signal
PS-ON# is an active low signal. It turns all of the main power rails including 3.3v, 5v, -5v, 12v, and -12v power rails.
5VSB is a standby voltage. That may be used to power circuits that require power input during the powered down state of the power rails.
You can also check our other desktop motherboard power on but not display coming help guides.
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