What is Power Supply Unit (PSU) - Switch Mode Power Supply (SMPS)

A power supply unit or PSU is also known as Switch Mode Power Supply (SMPS) is an internal hardware component used to provide power for the computer system. It converts the alternating current (AC) into direct current (DC) use by the computer Components. The power  supply unit also regulates the voltage in a computer. The power supply converts 110-115 (or) 220-230 volt alternating current (AC) into direct current (DC) that is required for computer components to work properly. Typically the most basic computer systems are Suitable for 250 to 300 watt power supply.


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