I recently bough a b350m pro4 along with a ryzen 1500x and 1 stick of 8gb 2666 RAM model: CMK8GX4M1A2666C16.I activated the XMP profile in bios to get the RAM to 2666 but cpu z only shows 1333Mhz..am i doing something wrong?Also i put the stick in the A2 slot (manual says that slot has the highest mhz support.