You put it in the back close to the battery it should have a symbol indicating. I took it out of a hp but if you look at your current ram stick it will have the specs the pc uses.
Before I bid I would like to know if it actually works, are u wherein a Anti static band or something cause it could already be fried from a static discharge from your body :(
I got 2 of them off here and they worked when I checked them. I only used one and decided to post the other one since I'm not using it. I will double check to make sure it works before I send it.