Tom's Hardware Guide The doc gets under Intel's skin
Anand's Technical Page Reviews of latest hardware platforms here
Sysopt Get your screwdrivers out...
Sharky Extreme Chip stuff with a games twist
Ars Technica More good information, benchmarks, and reviews
Ace's Hardware Hardcore
HardOCP Truly an overclocker's paradise
AMD Zone Not just AMD though...
3D Now Major rallying point for the AMD community
Dr. Dobbs Microprocessor Resources This is what happened to Intel Secrets
JC's Pages Keeps a brief on what's happening chipwise
TweaktownTweaking down right down under fnar, fnar
Dansdata.com
Reviews and the occasional inspired lunacy
Tweak3D Produces solid hardware guides
BX Boards British, thorough, good
Fullon3D Reviews of new stuff here and interviews
FastGraphics Lots of solid information here
CPU Central Solid info about X86 platform, graphics boards etc.
Sandpile Good for all things x.86
The CPU Site
MicroDesign Resources Heavyweight chip analysts