Overclocking on the Intel Z370 platform is pretty easy. The easiest way to overclock would be up simply change the frequency divider in the BIOS. To achieve the best overclock we try to stay with the timings that the XMP profile recommends. If we run into any issues we will bump up the voltage to see if we can get our system to boot and become stable.
The XMP profile puts this kit at 3000 MHz. In the BIOS I started moving up the frequency divider. So we went from 3000 MHz, to 3066 MHz, and then to 3200 MHz.
At 3200 without touching the timings or anything our system was completely stable. When we went up to 3333 MHz the system would boot, but did not pass our stability test. So I decided to bump up the voltage little by little to achieve a stable system. I ended up at 1.4520V.
So our final stable overclock at the XMP timings of 15-17-17-35 is 3333 MHz, which is a 333 MHz overclock over the default 3000 MHz! Not bad at all!