Problem with sudden and shorts falls of fps in game

[MaxiSabino]

Lately I having a problem with sudden and shorts falls of fps in game. the game runs at 60fps normally but there are 1/2 second in wich the fps drop around 30fps.
I tried runs whith lower graphical settings but the problem continue.
Evidently the problem is not because CPU has low performance or being very demanded. I suppouse that the problem is another but I dont not which....
somebody can help me?

 

[Art-J]

Maybe adaptive V-Sync with halved refresh rate mode turned on in your NVidia control panel settings?

 

[MaxiSabino]

I have a radeon graphical card

 

[Jempy]

Windows 10 Fall Creators Update ?

 

[HypoToad]

Sounds like it could be something else taking up CPU time, you could check task manager when it's happening to see if you have unnecessary things running in the background.

 

[Msportdan]

Oh yea!! I have this on a 144hz monitor. At certain points In track ill get 72 fps locked. On the grid for example - No matter where I view, or camera it stays at 72!!. Then it will flutter around 90-110 fps in race then lock back around to 73 for a few seconds . This is with vsync on.no sync active in NVidia. I've had this for as on different gpu too. Also it will be fine with the first time I activate vsync then every restarted race after will go back into halving my fps!?

with vsync off ill get 90 fps on the same grid. Then around 90-130 in race. It's like a hidden adaptive sync in ac. Use fast sync again fixes this. But I have a gtx 1080 and ac isn't stressing my system.