You’ve just learned how to install your power supply; the next step in our How to build a PC guide is installing your motherboard. This is arguably one of the fiddliest bits of building a PC, so it’s important to take your time here. I’ll be building into an ATX-sized motherboard into a mid-tower case in this particular instance, but the same steps apply for ITX and mini-ITX builds as well – you’ll just have fewer mounting points to worry about.
Source : rockpapershotgun.com