Along with the innovation in computer case design comes an increasing  number of new fan designs. Manufacturers try to tune noise and  performance with tweaks to rotational speed, blade design, and even  grill and fan chassis alterations, giving the enthusiast a broad  selection of fans with differing acoustic and airflow levels.  SilverStone Technology has introduced a new version of the giant 180mm  fans used in their "vertical motherboard" chassis series (the Raven  RV01, Raven RV02, and Fortress FT02): the SilverStone SST-AP181 Air  Penetrator fan. Benchmark Reviews compares the performance of this new  fan to the stock fans in a Fortress FT02 case to see if the extra  performance justifies their price.
SilverStone SST-AP181 Air Penetrator Fan @ Benchmark Reviews
                 
                              SilverStone SST-AP181 Air Penetrator Fan @ Benchmark Reviews
 
       
      