Summary: If you want it at max speed, which you should, because the CFM gains outpace the loudness, what you do, is you strip the wire on the temperature sensor (the black wire leading to a very small node, which is the resistor; it is on the same side of the fan as the power, opposite the LED button).
Pros: Very Quiet, quality construction, great CFM:Db ratio for people who need a nice balance between cooling and noise (read: Home Theatre PCs), the Temperature Sensor works great for those who need as little noise as possible.
Cons: None, really. I'll put in a few counter-arguments to this fan, though. If you'd rather not have a fan that chooses its own speed, you should probably browse Enermax's Cluster and Magma fan lineup, Cluster is PWM, and runs at full speed when attached to a 4-pin Molex. It has almost the same CFM, t...
Summary: So I figured out how to bypass the auto speed control. just cut off the temperature probe, then spice the two wires together. its a thermistor - look it up, less resistance means it thinks its hotter. Now my fan runs full speed all the time. Its still pretty quiet. If you want to go back.
Pros: Quiet, moves a good amount of air. cool looking
Pros: Don't know why other are whining about these fans not putting out that much air. I paid for these to be quiet and they are very quiet. Went in my wife's computer, which is not overclocked. The ones in her computer before were very loud and she asked me to make them quieter. She is thrilled.
Pros: Application: I needed a low air flow fan to exhaust my case, in order to maintain positive pressure inside the case, with my other high output fan. My other fan keeps the air coming in through a filter. This should work great for keeping the air inside the case clean. If you exhaust your case fas...
Cons: Very expensive, especially with shipping. But If I had purchased this fan first instead of the much less expensive APEVIA CF12SL-4C, I wouldn't be buying two fans.