Power Supply

Power Supply Unit (PSU)
This unit supplies power to a computer system, the take the power from standard power outlets, it takes the AC current from the outlet and converts it to DC current along with regulating the voltage levels to reduce spikes in the supply to protect delicate systems.

Each PSU has a different watt rating which is the maximum amount of power that can be supplied to the machine. There is also an efficiency rating that indicates how efficient the power supply is at converting power.