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I fixed my issue my way becouse both Nvidia and Microsoft does not give a ♥♥♥♥ about what is happening to integrated and external GPUs.
Hope I helped. Good Luck

Yes. You need to download 'Nvidia Inspector' for that. It is a tool to let you change your graphic settings more precisely and other stuff. Run 'NvidiaProfileInspector' , choose Don't Starve and If I remember correctly change 'Optimus flags for enabled applications' to SHIM_MCCOMPAT_AUTO_SELECT and 'Enable application for Optimus' to SHIM_RENDERING_MODE_AUTO_SELECT . It is under 'Other' Tab. That is the main thing.
You can also try 'Threaded optimization' - Auto; Power managment mode - prefer maximum perfomance but I think those settings are mainly for higher FPS. If that did not help check in Nvidia Manage 3D settings if you have 'VR pre-rendered frames' set to 1 becouse when I started playing with that it started tearing again. I tested it only with Don't Starve so I don't know how it work with other games.

커비 괴롭히지마라..

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