Is there a Internet PC Parts database? Like IMDB except it's about PC parts: motherboards, CPUs, Power supplies etc etc
While not exhaustive, or necessarily that up-to-date you might find wikipedia a useful source. I've especially found the following pages useful, though there must be similar pages for other components:
- List of Intel Core 2 microprocessors
- List of Intel Pentium Dual-Core microprocessors
- List of Intel Pentium microprocessors