Here's a synopsis of a PC build pretty much everything is modular, you just plug in the cables and connect
The components together . This guy has decided not to put his build in a case . As I say the hardest part to building a PC is loading the software.
http://youtu.be/5FEIcx5Z-RM
P.s Use anti static earthing cable , and make sure your power is off while working on any computer build