Good Sites to Learn About Computers

[gafee2001]

I'm looking for a good site to teach me a bit about computers. For example, the differences between the Celeron 900 processors and some of the better ones, like the i5, i7s.  A good starting point is a site to explain frontside bus, cache, the differences between ddr2 and ddr3 ram.

Another  area I feel I'd like the most help in is explanations of processors. For example, the Intel Celeron 900 is explained as: 800MHz frontside bus, 1MB L2 cache and 2.2GHz processor speed. Where can I get some pointers on deciding how this all works and what each piece of information tells me?

Any good sites for someone just starting to delve into the more technical aspects?