Your screen resolution...tried changing it in the computer control panel? Right click on desktop and choose 'screen resolution"?
You don't control vert sync by using Wattman settings for any Directx game.
Wait for Vertical Refresh
Vertical Refresh or VSync, synchronizes the application with the monitor frame rate with the objective of removing screen tearing.
Note! Wait for Vertical Refresh only works OpenGL 3D applications. When using other APIs such as DirectX® or Vulkan®, VSync is controlled via the 3D application graphics settings.