What mobo and CPU, since you have all 4 can try them and see if they will play, might need some manual setup to get all to run at 1600 or 1866 if they all play initially
Try them and see, if they don't play it simply won't start then go to the two newest ones and try, if they work, let me know the model numbers and we'll see if we can get all to play - am grabbing some sleep so won't be back for a few hours 😉