In gaming performance, not a whole lot really due to games utilizing the GPU more so then anything. You might notice some things like browsers opening up a tad quicker but really the modern processor is hard to improve on just by upping the clock rate. As stated you may notice a slight frame boost but don't expect it to be life changing, overclocking now of days is really just a technique to squeeze every last drop of performance out of your CPU rather then a dramatic boost in performance.