Here's Anandtech's overclocking of the e6600:
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2795&p=18
So far with good aircooling and if your e6600 can OC that high, the jump to 4ghz from present speed is 67%.
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2795&p=18
So far with good aircooling and if your e6600 can OC that high, the jump to 4ghz from present speed is 67%.