CIAC Internet Hoaxes a division of the United States Department of Energy. This site has a listing of all the widespread e-mail messages about viruses, etc that are totaly false. A great place to refer people to when they send you warnings about the "Good times" virus, or other "e-mail virus" warnings.
Tom's hardware guide an awesome page
with lots of chip/chipset info, as well as benchmark surveys and in-house reviews
Tweakit Hardware Reference Site a great hardware
review site
System Optimization and other
performance tips.
Wim's BIOS page flash bios updates galore
Bjorn's 3d page dedicated to video cards using rendition verite
chips (ie: Diamond stealth II, Hercules Thriller 3d, Creative 3d Blaster, etc).
Cyrix homepage
AMD homepage
Intel homepage
Epicenter
Where Quake "hits hardest".
Quake Stomping Grounds.
Id Software authors hits Doom, Doom II,
Quake, and Quake2.