In case someone found this thread later, the issue was with the Citrix Workspace software, which I use to remotely connect to my workplace. For some reason, the software disturbed my GPU. More details here:[URL]  and here:[URL] 
Hello, Since several days I have very low FPS when playing games with my Dell G3 3500. This happened suddently, from one day to another, whith games that were running perfectly well before. - I rule out an overheating problem since it start immediately when I launch a game. My laptop has no time to heat.- I try to roll back the driver of my graphic card (NVIDIA GeFroce GTX 1660 Ti) both from NVIDIA and Dell website with no avail.- Windows 11 is up to date and I do not have the possibility to roll back to a previous Windows 11 update.- The BIOS is up to date.- Setting the games to minimal graphic did not help.- Unsitalling and reinstalling the games did not help.- The online troubeshooting Dell service did not find any issue on my computer.- All my drivers seem up to date.- I have checked for viruses or malwares but did not find anything.- I do not know if it is signifiacant but I had an issue with the Alienware command center approximately at the same time, it would not update. I uninstalled and re-installed it. Except for reseting my computer, I can of run out of idea of what to try. Does anyone has a suggestion?Thanks for your help!
Low FPS Dell G3 3500