Beginning with Windows 10 20H1, the Windows OS assigns the graphics processor to use for various applications, and overrides any settings made in the NVIDIA Control Panel > Manage 3D Settings > Preferred graphics processor setting for that application.
See Also
GeForce Graphics Cards - Ultimate PC GamingHow to Change Default Graphics Card Windows 11?How to Use Dedicated GPU Instead of Integrated [Intel/NVidia/AMD] - MiniTool Partition WizardMulti GPU CardsYou can change the GPU preference that the OS will use for an application from the Windows Graphics Settings.
If the OS does not have a GPU preference for an application, then you can specify the preferred graphics processor to use from the NVIDIA Control Panel > Manage 3D Settings > Preferred graphics processor setting.
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