"Inflatable Air Blower" with duct fins perfect fit so that the air flow is only one flow, in addition to the contact with the heat sink is no other adverse impulse disturbance and wind resistance, high heat exchange efficiency. Relative to the overhead for the side-mounted wind not only did blind, side-mounted fan and airflow can smoothly through the heat sink from the other side of the blow, "Inflatable Air Blower" can heat the entire heat sink fins blowing directly along the gap outside the chassis, so that the air flow inside the chassis very smooth, thus effectively reducing the overall temperature of the system! The overhead fan blind not to say there is wind, the air after reaching the bottom of the inevitable to generate eddy currents, affecting the efficiency and the cooling effect of air flow. Disadvantages: there are also side-mounted on the other side of the heat sink due to off "Inflatable Air Blower" farther disadvantages caused uneven cooling, especially in the small gap cooling fins, the air flow through the difficult situation. Another point is that when too much will cause the entire radiator covers relatively large thickness of side-mounted fan case, to the installation difficult.