When I got my iMac I was given 2 eight GB DDR3L-1600 SODIMM by an old friend of mine who is also a photographer. What he told me was the he got them from Best Buy and they were recommended for the iMac i5 by the sales rep. They are brand new and unopened so I believe they are crisp and clean. I'm not sure that this is correct but I can always have he or myself send them back if they are incorrect. The reason I even ask this question is that it says 16GB Kit Notebook on the package and that threw me. Also, assuming the best and these are correct, how do I remove the back cover and install the chips properly on the iMac. I did a lot of hardware upgrades on my Mac Pro and I remember that there was a distinct order that the chips had to be installed with. I always use a ground on my wrist when installing hardware as this room is carpeted. Just so you know.