I've been experiencing this for a long time now across many versions of MSI Afterburner but basically my custom fan curve looks like this: 0% from 0c to 40c 30% from 40c 60% at 80c I set temperature hysteresis to 10 degrees so that if I am playing something low GPU load that would otherwise keep the GPU bouncing between 31-40c, the fan doesn't keep shutting off constantly. The problem is, the fan will randomly ignore the hysteresis setting and just switch to 0% if below 40c for seemingly no reason. This is most prominent when exiting a game that loaded the card and then browsing idle on the desktop in 2D power states. It will cut off the fan at say 35c instead of waiting to reach 29c. Why is this happening? Is it a bug with MSI Afterburner? Is there some underlying code that only applies hysteresis during certain situations?