First step.




Install the Power Supply

Some cases come with power supply unit pre-installed for you. In that case, you only need to make sure it is an adequate unit for the computer you intend to build. Also, if you are building an ATX machine, you must make sure that the power supply is an ATX power supply. If the power supply is not already installed, you will need to install it now. Here’s how:

Take the power supply unit and line it up for placement into the PC case. The fan should blow toward the rear and the wires should face forward. Insert the PSU into the case. Sometimes this takes a little maneuvering to get it into position. Once the unit is in place, check the back of the case and make sure the holes on the rear of the PSU line up with the screw holes on the case. If they do not, you may need to turn the power supply over. Using your screwdriver, tighten the PSU down using standard chassis screws.