Question Rx 570 displayport not working

[FuriouStyx]

Hi everyone. Today i bought asus vg258 165hz monitör firstly i plug dp without hdmi cable then turn on computer but there is no display error in monitor then i put both cable hdmi and dp and select for hdmi and its works. but i only got 60hz. I google it but no way to find fix. Already thanks for help.

 

[FuriouStyx]

View: https://youtu.be/6pVoGleRHJQ


guys i got 250 avg fps on cs go at my old computer but this monitor think stuck fps and hz change like that can someone help me please