I am trying (unsuccessfully) to upgrade my 4gb 1600mhz ram to 16gb 1866mhz. When i instal into all 4 RAM slots i get an LED CPU/RAM error, if i put just 2 sticks in the system boots as normal. I also have to alternate the RAM slots, doesn't seem to work if i use 2 slots with the same colour code. I would appreciate any help/pointers on this problem.
crosshair formula IV
AMD phenom IIX6 1090T black edition