PC Technology Guide
Pc Tech Guide: Graphics Cards
Detailed explanation of the graphic card. A wide variety of topics are discussed. Sections to check out include: resolution, color depth, dithering, components, graphics processor, video memory, and RAMDAC.
Other
Karbos Guide: An Illustrated Guide to Monitors
The video system (of which the monitor is a part) is one of the most important components in the PC. This site is a must see if you are interested in learning about this system.