"220V Cooling Fan" thick angled blades have the best cooling capacity, because it produces a large air pressure, air flow is also very full, the exchange rate of increase for the cold is also good. But thick angled blades will bring more noise, and when the rotation axis of the centrifugal force for larger, more serious wear and tear, for life has a certain impact. More use of such blades on providing greater air volume fan violence. Thin corners "220V Cooling Fan" fan is improved on the basis of thick blades on the corners, it uses a more blades, so the air flow is basically guaranteed. Furthermore, since the lighter weight of the blade, so the higher its speed, and uniform speed, noise is not large. Like the recent hot players Cooler Master classic nine teeth sickle Hyper7 fan is used this design, but less than the maximum thin corners "220V Cooling Fan" fan pressure is slightly smaller, leaving everyone a trace of regret.