Tony, the www.weaknees.com "Twinbreaze" package not only has a quieter "main" fan, but it also has a 2ndary fan that mounts to the new drive bracket. It is aimed right at the chip's heat sinks. That new drive bracket raises the hard drive up from the board (to aid cooling) and allows mounting of a 2nd hard drive. So, the unit is cooler becuase of the new location of the hard drive(s) and the addition of the 2nd fan. Both fans mount with little rubber washers to issolate them. Your mention of the foam reminded me of these extra features.