Fan exhaust volume

Fan exhaust volume
Fan exhaust volume can be said to be a relatively comprehensive indicator, so we can say that exhaust volume is the most direct factor to measure a fan's performance. If a fan can reach 5000 rpm, but its blades are flat, then no airflow will be formed, so the angle of the blades is the decisive factor in the exhaust volume of the cooling fan. It is easy to test the exhaust volume of a fan. Just put your hand near the heat sink to feel the strength of the wind blowing out. Usually, a good quality fan can still feel the wind flow even if we are far away from it. This is the performance of good heat dissipation effect.
Fan bearing
CPU fan bearing is the most important component in the fan and the main embodiment of cost. The reason why high-end fans are expensive is mainly because they use advanced bearing types with long life and low noise. For example, the life of magnetic bearings is up to 100,000 hours, which is twice that of traditional ball bearings and three times that of sleeve oil seal bearings. The following section will specifically introduce this important component by category.