A good aftermarket 120mm fan fits nicely between the two towers, so u dont need to use the supplied bracket. Imo it cools better that way anyway. I have a 3 speed antec 120mm fan in mine, set at 5v, and at stock it idles at 32c and full load about 43c. Overclocked, set the fan to 12v and idles about 33c full load up to 52c. I'm sure that with a conroe temps will be a bit lower as well. We'll see in a couple of weeks time when I get mine.