As anyone can plainly see, the Titan MT1AB5 is blessed with a lot of fins, but the effective use of airflow paths is what will really make the grade. In this respect, Titan seem to have learned from old deficiencies. While both fans on the heatsink appear identical at first glance, that is not the case. The first fan is used to pull air into the heatsink and push it out through the fins. The second fan has a reversed impeller so that it pulls air from within the fins and expels it outwards into the surrounding environment. So basically, one fan pulls in, the other pushes out.