You may come across the “Default Radeon WattMan settings have been restored due to unexpected system failure” error message after a game crashes or after a restart. How to fix the Radeon WattMan crash issue? This post from MiniTool will show you solutions.
When you encounter Radeon WattMan crash error message “Default Radeon WattMan settings have been restored due to unexpected system failure”, don't be panic. It is probably caused by outdated graphics driver, enabled Fast startup options and overclocking issues on your computer. How to fix it?