Thank you for your interest in the game! The library I use to run the local LLM (LLMForUnity from undreamai) is supposed to be able to use either AMD either Nvidia GPU. However I received feedbacks from some AMD users saying that their GPU seems to not be properly used. If for some reason it can use your GPU, if fallbacks to CPU so the gam can still be played but is slower (depending on your CPU). The best is to try the free demo available at the end of the game page to check if the narration speed is enough or not in your system.