you need to start reading some overclocking guides. there are many of them and i will only be paraphrasing what they will tell you. read the guides at the top of this forum, do some googling and get back to us on anything you don't understand.
the basics of it is you want your cpu voltage (vcore) back down around 1.35-1.4v and then you try increasing the FSB by around 5mhz. you boot up windows and then test in a program like prime95. if prime95 doesn't crash then its stable. keep increasing the FSB in increments of 5mhz until it seems unstable and then you increase the voltage by the smallest amount possible and test again
