3D Hardware.net - Hardware reviews and news
Ars Technica - The PC Enthusiast's Resource
CDR FAQ - That's Frequently Asked Questions
CPU Review - Just what the name says
Da Lan Tech - Networking info and news
Hardware Central - In depth hardware info
Motherboards.org - Everything motherboards and other computer hardware
Overclockers.com - Pushing your hardware
Speedy3d - Hardware news and previews
Steve DeRose's guide to computer network wiring - yes, network wiring
Tom's Hardware Guide - One of the original online hardware guides