Google for a E6300 overclocking guide. Your overclocking results will vary. There is no garantee on how far you can get with the chip. There are many variables that will determine how far you get.
And that cooler you got doesn't really look like a good cooler for overclocking. So just google the guide and take notes. Start there and post what you come up with, and if you get confused someone will be able to help you more. Overclocking is not for the faint of heart. It takes a lot of practice, patience, and some luck.
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