POWER SUPPLY UNIT is also called as power supply or PSU. This is the device that supplies power to your personal computer. Although you could plug the personal computers directly into standard electrical outlets, the power supply then pulls the required amount of electricity and converts the AC current to DC current and it also regulates the voltage to eliminate spikes and surges common in most electrical systems.Installing psu
Installing Power Supply Unit
1. Position the Power Supply Unit (PSU) into the case as shown above. Screw it from the outside with 4 case screws.
2. Connect the 20 pin motherboard power connector on PSU controller. Its clip snaps when you push it down
3. New motherboard will require you to connect the 4pin or 8pin 12v motherboard power connector. Connect it and make sure the clip snaps closed to secure the connector.
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