A power supply does not create power or energy. This would be in violation of the Law of Conservation of Energy.
Rather, a power supply changes the form of an available source of power or electrical energy into a form that is acceptable for use by electrical or electronic equipment.
The input form is electrical energy defined by voltage or current or power, with a given impedance level, and frequency. The output form from the power supply is a different voltage or current or power, with a different impedance level, and possible a different frequency. Another possible is for the input and output to be of the same form but electrically isolated from each other for safety and performance concerns.
A power supply unit (PSU) provides power to all the components in the computer. Typically that would include the system board, the processor, the video cards, and storage devices.
power supply is a device that supplies electric power to electrical load
UPS = Uninterruptible Power Supply
If it is a computer power supply it is the box that gives the computer its power from the outlet.
Power amplifierPower supply regulatorSwitching power supply chopperetc.
all about regulated power supply
Advantage of regulated power supply.
any power supply with at least 175 watts
When your computer will not power on. When the cooling fan of the power supply has failed. When the amount of hardware in use in your case exceeds the power capability of your power supply.
DC Power is Direct Current Power Supply.
power supply is a device that supplies electric power to electrical load
To keep the power supply cool. If there were no fan the power supply would overheat and fail.
The "power supply" supplies power to a computer. A computer's power supply is a "switchmode power supply" responsible for converting the AC voltage from the wall into several DC output voltages.