I am not able to setup my LG 34gl750-b to 144 Hz with my AMD Radeon R9 380 4GB video card. I am using a HDMI 2.0 cable. I tried a custom setup in the Radeon software (19.9.2) but it says that my monitor cannot be set up that way. I only see a 120 Hz option in Windows screen setting but with 1920x1080 resolution. With 2560*1080 the maximum is 60 Hz.
What should I do to get 2560*1080 144Hz?