Sites with Instructions on

How to Build Your Own PC

Intel Intel® Processors and Boards Compatibility Tool
AMD System Building and Compatibility Information
PC Mechanic PC Mechanic's step-by-step procedures.
Build Your Own A British version with complete and understandable directions for beginners or experienced computer users.
MySuperPC Comes highly recommended as a self-help site for many do-it-yourself issues.
TomsHardware More information than you'll ever need here on this massive hardware-how-to site!
DaileyInt A newly updated and illustrated guide to building a PC.
Home PC Builder Comprehensive hands-on videos online or via DVDs, by subscription or purchase
Motherboards One of the best for motherboard reviews & lore
PC Buyer Beware An updated UK site on how best to buy, build, fix, upgrade, or recover a PC.