IT Lab has posted up a 2-minute video guide how to overclock to 2800MHz DDR3 using Corsair Dominator Platinum 2666MHz CL10 memory, a Core i7 4770K and Maximus VI Impact mini-ITX motherboard.
The overclock is designed to push the memory beyond its spec, yet still be stable for everyday use. Since the kit is based on Samsung K4B2G0846D chip, using the built-in profile within the Impact's UEFI BIOS, most of the work is done for you!