The design of the fan is like a turbine (but lets hope without the noise) but forces the air over the block and out of the rear. This of coarse means this cooler takes up 2 pci slots, the backing plate is included in the packaging and is just screwed into the backplate on its own without having to attach it to the cooler. Another feature that was nice to see was the fan connector cable, this is were the Arctic cooling silencer scores another plus point buy having the OEM fan plug rather than a traditional 3 pin with a four pin adaptor.
Check out the review of this classic cooler at Extreme Computing.