If the Shoe Fits ...

Just like everything else when building a desktop computer, you always need to make sure your power supply is compatible with the rest of your system. Check to see that the form factor matches that of your motherboard and computer case. Most likely they will be ATX, but it is better to be on the safe side. If you have a mini case you do not want a PSU that is too big. A small case with a large PSU does not leave enough room for proper ventilation, which could lead to your system overheating and crashing. You also want to make sure that your new power supply has all the proper connections to interface with your motherboard, drives and other components. Once you have purchased and installed your new power supply, make sure to always have it plugged into a surge protector. Plugging directly into a wall outlet puts your computer at unnecessary risk.