Like most motherboards these days there are quite a few different ways to overclock your system. The easiest way would be in the TPU section of the Ai Suite III software. Here you change the values for the BCLK Frequency, CPU Ratio, CPU Cache Ratio, CPU Strap as well as all of your voltages.
Moving into the BIOS there is a CPU Level Up option that will give you instant overclocks based on your processor. For our Core i7-4770K it has set overclocks for 4.2 GHz, 4.4 GHz and 4.6 GHz.
Of course we are going to do our own tweaking in the BIOS to get the best overclock. I was able to get the system to boot at 4.8 GHz, I had to move things down to 4.6 GHz for the system to remain stable. Interesting enough this board has the same power delivery components as the Maximus VI Hero and the Maximus VI Formula, yet I was able to get both of those boards up to 4.7 GHz stable.