Ever since I got the RX 480, the fan has been at its default speed, and it won't change unless I use third party software (like SpeedFan).
In the screenshot below, I have no third party fan controlling software enabled (disabled SpeedFan and then rebooted the PC), and I'm running 3D Mark to increase the temperature.
Even if the GPU temp reaches the target temp at 40, the fan RPM remains the same. It never changes.
Here's the screenshot: http://i.imgur.com/xPMii09.jpg
I haven't found anyone else with this problem, so I'm wondering what might cause it and how I can solve it.
The BIOS is up-to-date and the drivers for the GPU is the newest one (16.7.1).