The motherboard is a strong defining factor in building a computer, depending on what motherboard you choose, you pretty much dictate what hardware you’re able to use and add. Before getting into detail about the different technologies you’ll find packaged into your motherboard, let’s go over hardware really briefly.
First of all, not all motherboards are the same size, there are many different factors, the most typical is the ATX factor, but there’s also MATX, EATX, and MITX (and a few others that aren’t as common). Keep in mind this is only in terms of desktop-class motherboards, server and laptop motherboards have different sizes still.