So, I make the registry issue on CCleaner and also dell bfv folder so all is rset and the issue still here... I only have BF5 on this pc
I test temperature, Max GPU 78C and max CPU 100C, and what i can see is that like everytime the game was okay at 60 fps for 5 first minutes and after it come to 25fps for 7-8 min and after go at 60 fps. What i see on the screenshot is that when T CPU hit 100C some security stop cpu and let him refresh at 60C, during this time i have under 25 fps and when th cpu hit 60C the game work at 60 fps, and again and again !
The think is that 1 week ago i can play 2hours at optimum settings and 60 fps with no issue of that and the day after it start to do that...
I also go in DELL POWER MANAGER because i see that can help for overhaeting issue on dell g3 but it change nothing CPU also hit 100C.
I don't have the solution..