Theres not many fans that will beat a Viper at this all round spec CFM, Static Air Pressure, Noise.
Akasa Viper -
- High performance 12cm fan in killer VIPER yellow colour
- S-FLOW fan blade design delivers 30% higher airflow
- Super silent with PWM auto speed control
- Hydro Dynamic Bearing extends fan life up to 50,000 hours
- Dimension: 120 X 120 X 25mm
- Fan speed: 600 -1900 RPM
- Max airflow: 83.63 CFM (141.75 m3/h)
- Max static air pressure: 2.98 mm H2O
- Noise level: 6.9 -28.9 dB(A)
- Fan life expectancy: 50,000 hours
- Connector: 4pin PWM
As l say running 3 with my Rad mounted externally, and l can just hear them when they peak at 1700RPM.