I just completed my first build, AMD FX-8120, GA 970a-ud3, corsair vengence 1866 8g ram, corsair 500w PSU, but my ram is showing as 1333 and not 1866. I have tried to tweak the voltage and set the ram to 1866 to no avail. When I do try and change it most the time the system crashes and I am stuck with a black screen for a couple minutes and have to let it rest. Its not that 1333 is bad, but I would like to get the full experience out of it how am I able to work with this ram to make it run as 1866.