How can you have 4 sticks of DDR3-1866 in a motherboard that only supports 2 at that speed?! If you want to use 4 sticks, you have to use DDR3-1600 or slower.
Either one of three things has happened:
A. This computer has never been built, and only exists on paper.
B. This computer has never been tested.
C. Nobody at CyberPowerPC knows WTF they're doing, and/or they didn't RTFM.
Take your pick. I know I wouldn't buy from them. If you want something good, make sure the builder validates the parts first.