TweakTown
Reviews, articles and comprehensive guides to tweak your computer system.

Tweak Hardware
Includes detailed, easy to follow how-to guides about tweaking and modification. Guides cover a variety of hardware topics.

Tweakfactor
Articles about performance tuning of hardware and games.

7Volts
A technical site dedicated to practical computer modifications and enhancements.

The Lunch Box
Source of information to help increase the performance of a PC and extend its useful life.

PC Speed Up
How to guides for PC optimization and daily maintenance.

Speedy 3D - How To Section
How to guides for hardware installation, and computer & case modification.

PC-Mod
Modifications reference that includes case windows and watercooling your CPU.

UncaMilty.com
Articles and personal reviews on motherboards, CPUs and upgrading.

The PC Improvement News
Tips and tricks, and tech articles updated weekly.