ok i cant because there is no seller so u mean i can do thatDo not buy 2 times a 1 stick of RAM. Buy a 2x8GB RAM KIT. RAM that comes in a package sealed together that are 100% guarantee to work together. If you buy 1 stick and another 1 stick that are not from a RAM KIT you can have issues.
If you want to be sure that you have no issues go for a 2x8GB DDR3 1600MHz RAM Kit.