2. POWER SUPPLY UNIT (PSU) PSU is a device that supplies power to a computer. PSU regulates the voltage to eliminate spikes and surges common in most electrical systems.

3. Position the Power Supply Unit (PSU) into the case as shown above. Screw it from the outside with 4 case screws. 1 2 3

4. Connect the 20 pin motherboard power connector on PSU controller. Its clip snaps when you push it down. CLIP

5. 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.

6. Push down the 20 pins power connector to tighten it. Dont worry because the clip will automatically snaps the PSU controller so it will be secured.