DX12 Ultimate is included in Windows 10 version 2004 and newer (and all Windows 11). It adds ray tracing tier 1.1, sampler feedback, and mesh shaders. Just keep Windows updated.
Microsoft does not provide a standalone installer specifically for DirectX 12 on Windows 10. Instead, you must use the following methods to ensure you have the latest version: Open the Start menu and select Settings (gear icon). Navigate to Update & Security > Windows Update . download directx 12 for windows 10 -32-bit and 64-bit-