What I've learned, I can't teach you in a couple posts. There are forums and forums full of useful information. I know the easy thing to do is ask me, but try searching google. It will bring up df and other forums. I learned what I know from reading, and reading, and reading, then after all the reading, finally doing. I would suggest you do some more reading my friend.
If you want to learn everything you could possibly know about overclocking, search for a thread entitled "overlooking 101" the op is skull one.
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