I've heard stories of people overclocking to around 4.3 GHz with the stock cooler without any issues. Are these claims true and can I if possible go any higher?
The G3258 is really a fun chip to overclock. I would however not recommend the stock cooler for anything over 4.4Ghz. I did manage to get 5Ghz using a standard hyper 212 evo but like scuzzycard said, it's luck of the draw how high your chip can go.