In simple terms, RPCS3 creates multiple "threads" (simultaneous processing tasks) to mimic the PS3’s 1 PPE + 6 SPE core layout. When a thread is terminated due to a fatal error, it means one of these virtual processors encountered an instruction or a state that it could not legally execute or recover from.

If the error persists on Vulkan, try switching the Renderer to settings to see if it’s a driver-specific conflict. 4. Check for Upscaling Issues Thread terminate due to fatal error · Issue #7815 - GitHub

While a definitive fix may require ongoing development and testing, several potential solutions and workarounds can mitigate the issue: