![Amazon.com: Enermax D.F. Storm 120mm Dust Free Rotation Technology High Performance 3,500 RPM with 3 peak RPM options and 4-pin PWM connector Case Fan, UCDFS12P : Electronics Amazon.com: Enermax D.F. Storm 120mm Dust Free Rotation Technology High Performance 3,500 RPM with 3 peak RPM options and 4-pin PWM connector Case Fan, UCDFS12P : Electronics](https://m.media-amazon.com/images/I/918n+QuckSL.jpg)
Amazon.com: Enermax D.F. Storm 120mm Dust Free Rotation Technology High Performance 3,500 RPM with 3 peak RPM options and 4-pin PWM connector Case Fan, UCDFS12P : Electronics
![The constant jumping of RPM when using default CPU fan settings really bothered me, so I came up with this custom one. Is it good/safe (Ryzen 5 3400G with stock cooler) : The constant jumping of RPM when using default CPU fan settings really bothered me, so I came up with this custom one. Is it good/safe (Ryzen 5 3400G with stock cooler) :](https://i.redd.it/b0j6527ji3961.png)
The constant jumping of RPM when using default CPU fan settings really bothered me, so I came up with this custom one. Is it good/safe (Ryzen 5 3400G with stock cooler) :
![dc motor - Confusion with RPM calculation of a DC fan from its datasheet - Electrical Engineering Stack Exchange dc motor - Confusion with RPM calculation of a DC fan from its datasheet - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/uExUN.png)
dc motor - Confusion with RPM calculation of a DC fan from its datasheet - Electrical Engineering Stack Exchange
![CPU Fan over 4000 RPM when simply browsing a website, and much more when gaming. | Tom's Hardware Forum CPU Fan over 4000 RPM when simply browsing a website, and much more when gaming. | Tom's Hardware Forum](https://forums.tomshardware.com/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FA4DG7tU.png&hash=bddb460a2f2b834a13d3ecc709281a1c)