Well i have setup my new rig in a Lian Li PC 60 case which is fitted with four 80mm fans and the noise is unbearable after my little shuttle. Do i really need four fans as I also have an enermax psu with its extra fan plus I only have 1xhdd, 1x dvd, so its not in need of lots of cooling. i am also using the retail heatsink with my Skt 754 3400 and that too has what looks like an 80mm fan.