1. "Tiny Cooling Fan" side length of 6cm, speed about 3500rpm still available and acceptable amount of wind noise, below this speed may be affected due to insufficient air flow cooling effect; further increase the speed to about 5000rpm, get good the air volume and pressure, but a sharp increase in noise; 6000rpm rotational speed can be included in the list than "violence" of the fan.
2. "Tiny Cooling Fan" side length of 7cm, speed about 2500rpm still available amount of wind noise and low, below this speed may be affected due to insufficient air flow cooling effect; further increase the speed to about 4000rpm, can result in more large air volume and pressure, but a sharp increase in noise; 5500rpm rotational speed can be included in the list than "violence" fan, the effect is slightly stronger than 6cm "violence" fan.
3. "Tiny Cooling Fan" side length 8cm, speed about 2000rpm to get a good amount of wind and low noise, even below this speed can also ensure acceptable air flow, fully embodies the advantages of large-diameter fan; further improve speed to about 3000rpm, get a pretty good amount of wind and air pressure, the noise is still low; 5000rpm rotational speed can be included in the list than "violence" fan, the sharp increase in the noise, the ultimate challenge endurance of the human ear.