15 R3, RAM compatibility?

Hey everyone. I'm trying to purchase RAM for my Alienware 15 R3 which takes DDR4. I have a set of Corsair in my cart, but for some reason i feel the need to verify that the RAM will fit into my laptop. Does any DDR4 chip fit into my laptop or is there some other specification like size i need to look up? Here's a link for the RAM i've chosen, i just need to know if this is compatible.