How to install the Power Supply

NOTE: When building a new computer or upgrading an old one, until we are ready to test the computer, always keep the power supply UNPLUGGED and keep the power supply in the OFF position, which is represented as an "O" on the switch. If it has no switch then unplugging it will be good enough.

1. Remove the Side Panel. Before installing the motherboard, power supply or any other component, we obviously need to open up the case. Most cases have two or three screws holding the side panel on while others just pop off. When removing screws remember to put them in a safe place so you don't lose them. Consult your owners manual on how to remove the side panel.

2. Take a look inside. Below is a picture of the inside of an average ATX case. Some cases come with a power supply already installed while others do not.

3. Mount the power supply. This is almost as easy as opening up the case. In the top left corner of your case is where we want to mount the power supply. The easiest way to do this is lay the case on its side and slide the power supply into place. There are four screw holes on the power supply that should line up with the 4 screw holes on the back of the case and if they don't, try flipping the power supply over. Simply screw in the screws and slightly wiggle the power supply to make sure it is nice and tight so it won't fall out when you stand your case back up.

4. Keep the power supply turned off. Like we stated earlier, leave the power supply unplugged and in the off "O" position until we are ready to test the computer.

Congratulations, you have just successfully installed the power supply. Before we can mount the motherboard, it's best that we go ahead and set up the motherboard, part 1.