"220V AC Cooling Fan" is the essential difference between passive and active air cooling radiator cooled radiator, no air-cooled radiator fan will not be called. Some users are accustomed to the whole called fan-cooled radiator, it shows how influential position. "220V AC Cooling Fan" is air-cooled radiator integral part of the cooling effect plays a vital role, is the only active radiator parts; at the same time, more work on the radiator has a decisive noise impact. In the air-cooled radiator fan functions as follows: by virtue of their diversion effect, "220V AC Cooling Fan" making the air to a certain speed, a certain way through the heat sink, the heat exchange between the air and the fins away on the accumulation of heat, so that "forced convection" cooling mode.