80mm Nexus PWM Silent Case Fan
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These Nexus Silent PWM Fans are variable speed fans using Pulse Width Modulation (PWM). PWM allows the motherboard to control fan speed. One advantage of PWM fans is that they allow for overall lower fan rotation speeds and the ramping up of the fan is extremely subtle. Wikipedia is a great source for more information on Pulse Width Modulation.
After leading the market for many years, with the Nexus basic real silent fans, Nexus decided to release their PWM versions of the Nexus silent case fans. Nexus has strived to set up the PWM fans with the best possible characteristics. Great performance and extreme low dB(A) ratings is guaranteed.
Nexus achieved an amazing 16.2 dB(A) noise level at 1000 RPM (measured in a chamber with a background noise of 15 dB(A)).
Take control of your fans...and hear yourself think again.
The use of a 4 wire PWM controlled fans is a means to reduce the overall system acoustics. The expectation is a 4 wire PWM controlled fan when properly implemented will be significantly quieter than a similar 3 wire fan.