b450 steel legend

Im Buying a Ryzen 5 2600X, a 2x8GB Corsair Vengeance 3000MHz CL15 RAM Kit and a ASRock B450 Steel Legend, my question is will the memory work out of the box with the board and do i put it in slot 2 and 4 because i dont see it being supported for pinnacle ridge on the ASRock website. I Will be...