There are guides and sites dedicated directly to overclocking, but it is a roll of the dice. Some people buy extreme edition processors to unlock the multiplier. I can't tell you what to set it at. Some processors that have been revised are more conductive to overclocking, some would say, while others are not. This is an area that will require a lot of research for you and your specific build. However, once the processor is toast, the whole system is usually a throwaway, so I would be careful about going to those extremes.