
This makes a PSU more feasible than the ones with wires that might tangle with each other and cause problems. Instead, they can provide power to their load without having to connect with any wires. Although any PSUs still use cables to supply the converted power to the load, developments have been made. Modern-day PSUs do not have to connect with wires. PSUs do not always need wires to power their loads. On a PC, the input source is always wall sockets that are supplying AC power that needs to be converted to DC power it goes into the internal components so that they can run properly. PSU converts power supplied by input sources such as power grids, electrical outlets, energy storage devices etcetera. Moreover, PSUs can also store energy to provide in times of less power availability and prevent interruptions in the circuit. These are also useful for maximizing the capacity of current and voltage that flows in the internal components of a PC. As a result, there are fewer power losses. The power factor correction feature allows you to limit your electricity bill by maintaining the power supplied to the PC. PSUs are also responsible for power factor correction.
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Similarly, it also limits voltage supply to the PC and prevents voltage surges and the damage caused by them to the PC. Apart from power conversion, these electronic devices also can regulate electric current to the device and ensure that all the components are running on a safe current. They can be built-in or may be installed by the user on the PC.

PSUs are known as power converters as well because they convert AC power to DC power.

This is because all the internal components like motherboard, central processing unit (CPU), disk drives etcetera operate only on DC power. A PSU’s main function is to convert AC power supply to DC power supply to run the internal components in a PC. Power supply units (PSU) are electronic devices that supply electric power to an electric load.
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