PM902F 3BDH001000R0005 So that the computer can safely power on and start the power supply device (Program Storage Unit) converts the AC power supply to the low voltage regulated DC power company for the internal components of the computer. Switching mode power supply is widely used in modern personal computers. Some power supplies have a manual switch to select the input voltage, while others automatically adapt to the supply voltage.
Most modern desktop PC power supplies comply with ATX specifications, including form factor and voltage tolerance. When an ATX power supply is connected to a main power supply, it always provides 5-volt standby (5VSB) power in order to power standby functions on computers and certain peripherals. The ATX power supply is turned on and off by signals from the motherboard. They also provide signals to the motherboard indicating when the DC voltage meets specifications so that the computer can be powered on and booted safely. As of mid-2022, the latest ATX PSU standard is version 3.0.
Desktop computer power will supply alternating current (AC) from wall sockets about mains power to low-voltage direct current (DC) operating motherboards, processors, and peripherals. Several DC voltages are required, and they must be adjusted with a certain precision to provide stable operation of the computer. A Power supply rail or voltage rail refers to a single voltage provided by the PSU. [1]
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