Some scattered "Cooling Fan Manufacturer" always think the heat sink provides better cooling, in fact, this is a wrong idea, a big fan of the advantage of long blades, large cooling area, so a large gas flow. However, if designed properly, a big fan of cooling capacity may not be as good a small fan. "Cooling Fan Manufacturer" Last Look cooling fan blades, the same fan if other parts remain the same, only the leaf blades from five to seven blades, air volume changes may not add much. (In the case the same amount of ventilation), but on the fan speed, the fan's speed will be lower than seven five blades, "Cooling Fan Manufacturer" If seven opposing fan blades, bearing wear, the more oil spills less, the longer life of the fan.