Solved! Connected my laptop to an external monitor that is 144hz and it doesnt show the 144hz option what do i do.

Solution
For that generation model it's not likely your video out supports running at 144hz.

Nothing you can do except replace the laptop with a newer one or run the screen at a lower refresh rate, or drop the resolution till you see the 144hz option.
For that generation model it's not likely your video out supports running at 144hz.

Nothing you can do except replace the laptop with a newer one or run the screen at a lower refresh rate, or drop the resolution till you see the 144hz option.
 
Solution