There are a few different ways you can overclock your system with the tools Gigabyte provides. The easiest way is with the EasyTune 6 software. It gives you 3 pre-defined Quick Boost overclocks. For our processor the Core i5-2500K they are 3.60GHz, 3.80GHz, and 4.10GHz.
You can also use the Touch BIOS to easily change the BIOS settings for an easy overclock. Being that I like doing everything in the BIOS I opted to do all over my overclocking there. Overclocking on Intel’s second generation processors is really easy. First I went ahead and changed the multiplier to 40 to get the CPU up to 4.0GHz. That was simple and a ran a stability test to see if the system was stable. From there I kept on moving up at 100MHz intervals until the system would not boot. I was able to get all the way up to 4.7GHz before the system would not boot. This was without any voltage adjustments. I went into the voltage settings and I bumped the CPU voltage up and just like that the system would not accept my BIOS settings and would always go back to the stock settings. It did this if I changed any of the voltage settings for the CPU. It was very annoying and I could not explain why I was doing this.
Going back to our 4.7GHz overclock it was not very stable so I started going down 100MHz intervals to find the best stable overclock. It ended up being 4.4GHz, which was a little disappointing.