Error FH501 indicates the graphics card isn't compatible with DirectX12 in Forza Horizon 4.
Error FH501 indicates the graphics card isn't compatible with DirectX12 in Forza Horizon 4.
Review your BIOS configuration and verify the PCIe x16 Interface setting is enabled in Auto mode. Adjust it to Gen 4 (or Gen 3 if using a Gen 3 NVMe drive) and restart the computer. After that, reinstall the latest drivers via DDU. This helped with several systems experiencing issues when running AC Valhalla alongside a DX12 error. If the problem persists, consider using the DirectX End-User Runtime Web Installer to reinstall DirectX.