I bought this fan as a replacement for the stock fan that came with the Corsair H60 CPU Water Cooler and I have to say that this is what the stock cooler should have been. The Corsair Air Series SP120 Quiet Edition is just that, quiet. At only 23 dBA it's barely audible (even with the side of my PC case off), where as the stock H60 fan was very loud and was beginning to deafen me a bit.
At 120mm it fit the H60 radiator just fine (no doubt this fan will fit other Corsair CPU water coolers too). I even managed to fit all 4 of the long screws that are supplied with the H60 into this fan where as with the stock H60 fan I could only manage to fit 2 as there seemed to be a slight misalignment on fan. The SP120 runs at 1,450 rpm, which should be enough to cool the Corsair H60. The stock fan speed of 2,500 rpm was over kill IMO. In fact I haven't really noticed much of a difference in CPU temp using the SP120 over the stock H60 fan.
The H60 requires a High Static Pressure fan/s in able to cool the liquid passing through the radiator efficiently. I'm happy to say that the Corsair SP120 is a high static pressure fan, which makes it an ideal replacement for the stock fan that comes with the H60. It's so good in fact that I might get another one and use the two on the H60 radiator. This fan also comes with rubber corners to minimize vibration, which is an added feature to cut down on even more noise. Also comes with 3 different coloured, easy to change pop out rings so that you can match the colour of the fans to the interior of your case (like if you have a blue'ish coloured motherboard you use the blue rings etc) which mine is.
Yet again, another impressive piece of hardware from Corsair, I really can't fault any of their gear to date (apart from the loud stock fan on the H60). I'm planning on getting a few of these fans as case fans, that's how good they are.