We will be using our Intel Core i5-2500K processor with this motherboard. It has a default speed of 3.3GHz. If you are new to overclocking you may want to use Gigabyte’s EasyTune6 software that has default overclocks built into it.
For the i5-2500K the built in overclocks are 3.98GHz, 4.22GHz and 4.47GHz. You can also go into the software itself and manually change your frequency settings. You will need to restart for them to take effect.
Like most people I like to do my overclocking in the BIOS. So just to start things off I went in and set the CPU clock ratio to 40. This brought our system up to 4.0GHz. That was easy enough right? How about we try 5.0GHz? Well that proved to not work, even with bumping the voltage up on the CPU I was not able to get the system to boot. I was able to get the system to boot at both 4.9GHz and 4.8GHz, but it was not stable enough to run benchmarks. Cross our fingers for 4.7GHz?
Well 4.7GHz seemed to work perfect and after running 2 hours of stress tests it was stable as well! This is our higest overclock that we have achieved with our i5-2500K and much improved over the 4.4GHz that we got with the Z68XP-UD4 board. It is a 1.4GHz (42%) overclock, which is pretty good!