Hello I played FH 4 with xbox gamepass before and now after trying the demo again I bought ultimate edition. Although I got 55-60 fps with the xbox game pass long ago and getting 55-60fps with demo now, I am only getting 15-20 fps with the current version of FH4 Ultimate edition.
Footage are taken in the same hour with same pc: ( PC Specs: https://i.imgur.com/J6Dhbl8.png , windows 10 version 2004)
Demo 1080p Ultra settings 55-60 FPS: Forza Horizon 4 Demo Ultra 1080p - YouTube
Ultimate edition 1080p Ultra settings 15-20 FPS : Forza Horizon 4 Ultimate Ultra 1080p - YouTube
Ultimate edition 1024x768 very low settings 15-20 FPS : Forza Horizon 4 Ultimate very low 1024x768 - YouTube
It seems that current version of the game locking me to same FPS interval for some reason although I tried to lock fps to 30-60 or unlimited with vsync off result was same.
While FH4 Demo is version 1.19** Ultimate edition is 1.4*** .
I used DDU in safe mode to uninstall graphics drivers and reinstall the latest version didn’t fix.
Tried changing pagefile to 3072-20000 to increase pagefile didnt fix.
Tried changing app settings in nvidia control panel and set to maximum power didn’t fix.
Tried re-installing the game didn’t fix.
Tried disabling second monitor didn’t fix.
Finally I said f it and did a fresh install of windows, didn’t fix.
Although problem seems to be rooted at game version I would like to ask for other possible fixes to give my last attempts. Thanks for the time and help.
EDIT: Fixed by completely removing softether vpn from my pc . Apparently disables ikeext which is important for forza game. credit to @kruglove