The Yate Loon 120mm quiet case fan has a true 33 dB(a) decibel rating - measured in an anechoic chamber using ISO standards. This is one instance where the case fan's decibel ratings haven't been understated by the manufacturer. This 120mm case fan is a quiet case fan. Yet, it measures at 70.5 CFM airflow level and is available at a reasonable price. This quiet fan also includes the added advantage of both a 3-pin motherboard power connector and a 4-pin standard power connector making this a very versatile case fan.