You ' re not measuring the sound in a consistent manner . Comparing the 1080 to the other two cards while running it right up against the PSU is going to make it sound waay louder than if it was running in the test bench . Have you ever turned on a fan , like a fan in your case or just a room fan , and brought your hand or a board or something relatively flat up to it ? The fan becomes much louder when you interrupt or block the airflow to it , you can try it right now with your computers case fans , bring your hand up to the fan and listen to the sound as move your hand closer and further away . You should take the card out of your case and run it in your bench like you did with the other two . <| sep |> myeah , not sure how you were supposed to count in order to get four or five . Might have used improper resources last time I had this discussion .