Summary: I installed the fan expecting a 3 prong plug, and found I needed to use both the 3 prong plug with the yellow ground wire, and the white 4 prong plug with the red + and the black - for my system to recognize the fan, so take that into consideration. The fan is awesome with the temp. sensor. It runs very quiet at idle and even when it ramps up the speed when system gets warm still runs at a low decibel reading, can barely hear it.
Summary: I used this fan as a upgrade on a Dell Deminsion 4300. Mounted fine in the oem fan shroud for rear tower exhaust. The fan is not as thick as the oem but worked fine with no audible vibration issues. Moves plenty of air and not too noisy, but I have not stretched it out by no means. Great buy for a fan with thermale detection built onto the unit. Thanks eWiz!
Summary: The selling point of the ThermoFlow series of Vantec is the little thermistor in front of the fan, which detects the internal case's temperature and the fan will throttle its speed to find a balance between cooling and noise output. This fan blows a nice amount of air and is not too loud. The fan does get noisy at the highest speed, though not all that bad. Overall, a nice product for users that want a no-hassle case fan that will cool on its own.
Summary: Designed for moving the most air possible - and it does move a lot of air for maximum cooling. However, its noisy compared to other fans. Good for servers where cooling is required and noise is a secondary concern.