In my PC I have a crucial ballistix sport AT 1x 8GB DDR4 2666mhz CL16 and I was thinking to upgrade with an other 8GB stick; is it ok if I use a crucial ballistix sport LT 1x 8GB DDR4 2666mhz CL16?... the only difference between them is the initials AT and LT and i'm not sure if they are fully compatible, can you help me?