Noise is increasingly focused on a lot of players, for the "220V Cooling Fan" is the noise come from the fan. A little bit of difference between the blade and will not cause a big impact, but to know that in fact the tiny vacuum region may be the biggest source of noise, many manufacturers are "220V Cooling Fan" fan up and down no small effort, mainly through some strange little reformed to achieve better mute diversion effect. "220V Cooling Fan" of wind pressure and wind volume has been relatively easy to confuse the concept of many players, the simple, the pressure is the pressure of the wind, the greater the pressure, the greater the power of the wind, the more likely the chassis punching , air filter and other parts blown through. The wind can be understood as the same time the air flow through the fan size, at the same time, you can exchange more airflow to enhance heat dissipation.