- Review -
NF-F12 PWM
Careful listening did not reveal any clicking at all on this fan at any speed, at any PWM duty or at any Voltage. The Noctua engineers clearly achieved their objectives. The total absence of clicking in PWM fans is unique to Noctua.
To repeat: There was no clicking at all on this fan at any speed, at any Voltage.
"The Noctua NF-F12 PWM brings three innovations to 25mm fans. First of all, it brings the stator vane design to 25mm consumer fans. The stator vanes improve the static pressure, which allows this fan to excel when it is used on radiators, as well as holding its own on heatsinks.
The second innovation is something new in stator vanes -- varying angular distance. It not only makes these fans quieter, but it is a great idea. A fan that spends less energy making noise probably spends more energy pushing air. It is an innovation you might later see on industrial fans.
The third innovation is the non-clicking PWM circuits. At low speed, all you hear from this fan is air. This is such a good idea that since the introduction of this fan, the click-free PWM circuit has spread to all of Noctua's fans.
Of course, there are a number of other innovations with this fan, but the three above make this a GOLD fan." (Ed Hume, Vortez.net)
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