How to Get 60Hz on a 4K Monitor Stuck at 30Hz | Win 10 | Macbook Pro 4K@60FPS On External Monitor
1. Does your monitor support it?
Make sure that your monitor is rated for 4K 60Hz. Check the official specification for your model.
2. Does your graphics card support?
Most integrated graphics cards, i.e. Intel HD Graphics don’t support 4K at 60Hz. Typically dedicated graphics cards after 2016 support 4K@60Hz, but be sure to check your specifications.