The PC Improvement News
- Tips and tricks, and tech articles updated weekly.
- http://pcin.net/help/articles/

Overclockers Forums
- Highly active forum dedicated to overclocking Intel and AMD based PC's.
- http://www.ocforums.com/

OCWorkBench
- PC hardware news, articles, and reviews site with a large forum community for overclocking and tweaking.
- http://www.ocworkbench.com/

MxMaster
- PC Modding from Kharkov, Ukraine (Russian language site)
- http://www.modding.kh.ua

Capsa Casemodding Community
- A discussion forum to get help with or show off casemodding work.
- http://www.capsa.dk/?lang=en

MVKTech
- Hardware Tweaks, Reviews & BIOS Resource Center
- http://www.mvktech.net

Guru3D
- Reviews, analysis, drivers and tweaks for 3D graphics cards.
- http://www.guru3d.com

[H]ard|OCP
- Offers news and tips to help achieve maximum PC performance.
- http://www.hardocp.com

Overclockers.com
- Overclocking enthusiast site that focuses on overclocking news, reviews, and practical advice on the cutting edge of PC performance.
- http://www.overclockers.com

PC-Mod
- Modifications reference that includes case windows and watercooling your CPU.
- http://pc-mod.com

Speedy 3D - How To Section
- How to guides for hardware installation, and computer & case modification.
- http://www.speedy3d.com/articles#how-to

PC Speed Up
- How to guides for PC optimization and daily maintenance.
- http://www.pc-speed-up.com

Tweakfactor
- Articles about performance tuning of hardware and games.
- http://www.tweakfactor.com

TweakTown
- Reviews, articles and comprehensive guides to tweak your computer system.
- http://www.tweaktown.com/