Easy RAM Upgrades 
Computer Peripherals guide Rick Russell's terrific RAM upgrade article.
FPM, EDO and Synchronous DRAM
A technical whitepaper on DRAM. Focuses on comparisons between
FPM and EDO.
Is RAM Shortage Causing System Crash?
How much RAM do you need and is too much RAM a bad thing?
Memory
Step-by-step installation guide, terminology, comparison of types, and more.
Memory Module Identification
A photo guide to identifying your memory modules.
The RAM Guide
Solid technical discussion of DRAM. Extensive coverage of
the types of DRAM commonly used in current PCs with nice
technical drawings.
Random Access Memory
A beginner's guide to RAM.
The Ultimate Memory Guide
A thorough discussion of memory topics including how it works,
how much you need, and recommendations from Kingston Technology.
Elsewhere on About.com 
