Get a RMA # if they are not running at manufacture's specifications. You didn't list the model but you should double check the side of the ram and make sure you got the correct kind. If you did and you are manually entering these times and are receiving BSOD you will probably want to return. You could run Memtest as well to see if one of the sticks is faulty. But either way I'd exchange/return them.
Note to check if these sticks are supported with your board.