you identify the stick by the ic's marking on these you want the ending to be bt-d43 kinda hard to see by my pic but its there.

be aware hynix has other ics out there and arent half as good as these. just make sure its the exact same bt-d43 marking.
i think the other marking nor so good marking is "im guessing here" is bh-t43 or something like that. im not even sure kingston uses these but ive read about them is all,knowledge saves money and time!

these sticks are the sleeper sticks of the oc world.