check your motherboard user manual--it may support higher speed but refer to it as overclocking the ram
no one of my corsair vengeance 8gb ram is already installed and has the max bus of 1600 , it would be useless to check for my motherboard manual , can't have two Rams on different bus speeds
Will it be a problem to have a corsair vengeance 8gb 1600 and another 8gb hyper x fury 1866 downclocked at 1600 , is it bad to have two Rams of different brands ? Sorry I know it's a silly question