The easiest way to overclock on the Intel platform is to 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 3600 MHz. It seemed each time we would try to go above that the timings would change on us. Manually setting the timings to the XMP profile values and upping the voltage did not allow anything past 3600 MHz. Increasing the timings we were able to get a stable overclock of 4000 MHz with timings of 19-19-19-43 at 1.42V