First, that motherboard is not a very good one for overclocking. And the stock cooler that comes with the FX 6300 is not very good. That being said, I got my FX 6300 up to 4.1ghz using the same motherboard, but with a good Zalman aftermarket cooler. I backed it down to stock frequency because I really don't need the overclock for what I use the computer for.