GTA V non-steam: low fps compared to Windows

Hi’ I’ve recently installed GTA V on Arch but I’m only getting 45fps on average whereas on the same computer on Windows I’m getting 70fps. I have an Nvidia Geforce gtx 960 and Intel i5 6400. So far I’ve enabled Esync, disabled window compositing and enabled Gamemode but my fps is still the same. Do you have any tips on how to improve it?

Hello, do you use last DXVK version 1.6 with Wine 5.5?

Wine don’t do perfect miracles. The use of Wine cost some performance compared to Windows. I’m pretty sure it’s your i5 that is saturated, am i right ?

Do you have latest proprietary(not open source) nvidia drivers?