The Tech Report has written a guide for those of you who haver never build a computer:
For those who lack the expertise to pick the best available components, we compile regular system guides outlining our recommendations at various price points. These guides are a great starting point for seasoned PC hobbyists contemplating a new build, but they're an invaluable resource for less savvy users seeking guidance as they step into the enthusiast realm.
Users new to building systems from scratch need more than just a shopping list, though. There's an art to assembling a rig from bare components. Building a PC can be a daunting task for a newbie who has never put a system together before. For those folks, we've crafted a step-by-step guide covering the basics of system assembly. Keep reading as we show you how to build a PC from scratch.