PowerColor has revealed the results of a collaboration with its thermal partner, the Double Blades fan design. The fan gets its name from the design, with an extra, small, fan blade attached just in front of the larger blade. With this placement of the small blade airflow is absorbed into the center of the fan. PowerColor claims a 20% increase in airflow compared to standard fan designs. The smaller fan blade also helps to reduce dust buildup.
Source: Press Release