The Yate Loon 140mm quiet case fan has a true 25 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 140mm case fan is extremely quiet case fan. Yet, it measures at 46.9 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.
Real Silent, only 25 dB(A)
High airflow level, 46.9 CFM
3-pin motherboard connector / RPM monitoring
Two 4-pin connectors (male and female)
Air Flow: 46.9 CFM
Fan Speed: 1000 RPM
Noise Level: 25 dBA
Power: 1.7 watt
Current: .5 Amp
Fan Size: 140x140x25 MM
Connector: Includes a 3-pin motherboard power / RPM connector and a 4-pin standard power connector