Use of ray tracing in project

I am working on a game that uses Ray Tracing. What would exactly happen if I run the packaged game on a system that doesn’t support that feature? Would it CTD or simply disable that part? Is it possible to determine the graphic card used by the user and in case it doesn’t support it, disable RT? Even if such thing would need some C++ coding.

when the system that doesn’t support Ray Tracing it will disable the Ray Tracing and enable lumen, I don’t know a way to determine the graphic card used by the user but I know that some Nvidia plugins have a function to check if it can run Ray Tracing, anyway I recommend you use DLSS Reflex and RTXGI if the game has Ray Tracing(in short DLSS gives more fps, Reflex lowers the input lag and RTXGI is better Ray Tracing then what unreal has)