Airflow or static pressure: Case fans generally come with two types of fins: those designed for airflow, and those designed for static pressure. Airflow-optimized fans are quieter and great for unrestricted areas, like the front of your case.Some fans and cases even come with manual switches for basic fan control. With a compatible motherboard or a fan controller, though, you should be able to adjust your fans’ speed for the perfect balance, so this won’t matter as much. Faster fans move more air, but slower fans are much quieter. Fast or slow: Case fans are rated at a maximum revolutions per minute, or RPM. RELATED: Can You Build a Fanless Desktop PC? Since the tiny electric motors in the fan mechanism doesn’t need to spin so fast, bigger case fans are quieter than smaller ones-and thus more desirable, if your case supports them.
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