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Airflow

Airflow is a parameter that indicates the volume of air a fan can move within a specific unit of time. Most often, this value is expressed in CFM units, which is an abbreviation for cubic feet per minute. In the context of computer cooling, this figure describes the fan's ability to exhaust warm air away from heated components, such as the processor or graphics card, and bring cooler air from the surroundings to replace it. Generally, a higher airflow value means potentially more efficient cooling, as air is exchanged more quickly inside the computer case. The amount of air pushed through is directly dependent on the fan speed, which is often associated with a higher noise level. However, a distinction must be made between airflow and static pressure. While airflow describes how much air moves in relatively free space, static pressure indicates the force with which a fan can push air through an obstacle, such as dense heatsink fins or a water cooling radiator. High-airflow fans are therefore suitable for case ventilation where resistance is minimal, while fans with higher static pressure are more important for coolers.

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