The motherboard connects all components of your computer and allows them to communicate. A motherboard and processor can only communicate with each other when they have the same socket. Also pay attention to the form factor of your motherboard, as it must fit in your casing. It's also good to see which video card you want to place on the motherboard. Some motherboards have room for longer video cards. As a result, a video card with 3 fans may fit on one motherboard, but not on the other.