After leading the market for many years with their BASIC series silent fans Nexus thought it was time to release a PWM version of their fans. All Nexus' expertise and experience has been put in these PWM fan models. They have strived to set them up with the best possible characteristics. Great performance and extreme low dB(A) ratings are guaranteed. The Nexus 120MM PWM Series case fan has an extra big fan speed range. This allows the fan to be ultra quiet at low speed and provide massive air flow at full speed in case thing get too hot.