|Memory controller supports DDR3-1333 and DDR3-1600 memory|
That means if u have faster memory, the memory controller inside the CPU will underclock the memory speed to DRR3 1600.
For God sake overclock your core i7 3770K if u wanna take advantage of DRR3 1866.
The Intel Ivy Bridge (Core i7 3770K) Review
Undervolting and Overclocking on Ivy Bridge
What else do u need?
You know the real meaning of peace only if you have been through the war.