I myself have the 900, wonderful case. Big enough for any GPU on the market, PLENTY of airflow, keep both of my 8800 gt (OC) nice and cool, as well as my OC'd E8400. Nice thing about the stock fans tht come with the 900 (not sure about the 300) is that they all have H,M, and L settings on them, though im not gonna lie, having all 5 120s and the 200 running at high is loud, but hey, thats why you spend money on either a nice pair of headphones or speakers!