Summary: Nice Fan. Only issue is the instructions. There are 3 connectors provided. One four pin with 3 wires which plugs into the motherboard. One four pin which allows another PWM fan to plug into it so you can series several fans if your motherboard can handle the load. Then you get this single wire connector. Whats this for?
Summary: I wanted very quiet fans for extra cooling in my PC case, but did not want to pay the premium price of the more recognized name brands. I took a chance on these fans and they fit the bill perfectly! All you hear is the air moving, and they move a good bit of it (about the same as a Thermaltake fan I had in the case). They are practically inaudible from 2-3 feet away, even while gaming.
Summary: I purchased this to replace a noisy whining fan in my brand new coolermaster case. Unlike the fan it replaces, this one is quiet and it is PWM. I don't have a means to measure airflow, but I can feel a definite difference in how much more air this fan pushes vs my stock case fan. I am considering putting this fan on my cpu cooler, which also has a stock coolermaster fan.
Summary: Fantastic fans! I purchased two of these to replace the current 120mm Cooler Master SickleFlow fans on the Hyper 212 EVO CPU cooler. They have been installed in a push/pull configuration. Installation was easy and I chose these instead of the Rev2 due to the PST feature to allow me to connect the two fans together onto one motherboard CPU fan connector. They are extremely quiet and do move quite a bit of air.
Summary: Great fan, solid and quiet. I am not a big fan of this wire harness though. I have many, it does not stop me from buying them, but prefer the simple 4-wire pwn connection. If you are lacking in MB fan headers, this will come in handy; if not lacking, then it will cost you an extra zip tie to secure the extra wire.... Have bought before, will buy again.