The C5 memory error lockup is a simple fix. The memory boot voltage has to be set at something that allows you to start the ram at the speed you specify otherwise the Crosshair will run at 1.2v which is a no no for 3200/14 or 3466/14. Fix is to clear CMOS, set the memory boot voltage to 1.35 or 1.4, save and boot into your OS. Once its performed a full boot cycle it will then allow you to play away without hard locks.