Akasa 140mm Viper R Fan, PWM Case Fan, HDB Long Lifespan Bearing, Anti-Vibration Rubber Mounts
Prolimatech Genesis "Dual Viper 140 Edition"
Akasa Viper 140mm - AK FN063 | fan noise - YouTube
Akasa Viper 140mm Fan AK-FN063
Akasa 140mm Viper R Fan, PWM Case Fan, HDB Long Lifespan Bearing, Anti-Vibration Rubber Mounts Included, High Airflow S-Flow Fan for Heatsink, CPU Cooling and Ventilation, AK-FN073