Probably vsync in english. That can only lower fps.
Also can you go back to your other dolphin version? Dolphin caches shaders and changing versions deletes it. The linked version also only works with some shaders. (IIRC 1/7 possible 1~1/2 of common)
Edit: On nvidia you should be using opengl/dx12 for best performance. Also can you see if you get screen tearing in opengl? (with vsync on)
Also can you go back to your other dolphin version? Dolphin caches shaders and changing versions deletes it. The linked version also only works with some shaders. (IIRC 1/7 possible 1~1/2 of common)
Edit: On nvidia you should be using opengl/dx12 for best performance. Also can you see if you get screen tearing in opengl? (with vsync on)