Power Suppy Installation (step by step build a computer)

STEP 6: Power Supply Installation 

If the case that you bought already has a power supply installed, then you can skip this step. If not continue on below.

1. Take the power supply out of the box and make sure to switch to 115v if it is not already (If you are outside the United States, this will be different)
   
   
2. Mount the power supply to the upper back part of the case by inserting the power supply through the side of the case, and then sliding it on the support rails in the back. (NOTE: If your power supply has two fans, make sure the second fan is pointing down.)
   
   
3. If you have everything lined up correctly, you should be able to attach the power supply to the case with the four screws in the back that hold it in place.

We now have the power source necessary to run everything! The next step is to prepare the motherboard for installation.