Rahego

Than it might be wrong vBIOS. Try to update vBIOS to correct g-sync one.

hey :)
i have flashed the 9th gen bios from @dsanke but still no gsync any suggestions?
graphics driver new installed 430.xx / bios set to default but no luck

Wrong BIOS. U should get the one for 9th gen but not RTX one. Regular GTX 9th gen from other topic.

http://forum.notebookreview.com/threads/official-coffee-lake-thread-bios-for-all-skylake-kabylake-clevo-lga1151-laptops.821694/
This is the link from the BIOS

hey mate i have buyed the suggestet screen what u told me (B173HAN03.1) but i have no g-sync at all i have flashed @dsanke Official Coffee Lake Thread/BIOS For ALL SkyLake/KabyLake Clevo LGA1151 laptops
all is working fine have 144hz but no g-sync .

did u see my last post is that the correct display?