CPU and GPU usage dropping along with frames in Fortnite

[icharles.ou]

Problem : After playing Fortnite for about 1 hour and a half, my CPU usage drops from about 20% to 11% ,GPU usage from 45% to 25%, causing FPS to drop from 200-350 to 120-180.

System specs :

Prime deluxe x299
i9 7900x @ 4.2 Ghz
4x8 gb 3200 MHZ corsair vengeance lpx XPM profile enabled
1080 gtx ti aorus xtreme
850W power suply EVGA gold.
H115i pro

Power plans are all on maximum performance. Temperatures are stable at CPU 45 degrees and GPU at 65 degrees.

After I restart the game, immediatly it comes back to normal and it takes awhile for the problem to start again.

What could be causing this CPU and GPU usage ? Why restarting the game is fixing it temporarily ?

 

[finitekosmos]

Are you seeing this behavior in other titles or just Fortnite?

 

[icharles.ou]

I just play fortnite but I guess I could test with overwatch

 

[finitekosmos]

Could be handy to know, sometimes a game update or patch can introduce problems into the game code. by checking other games, its possible to determine where the issue is.

If you get the same issue in different titles, the chances are good, there is something that can be done with your configuration to help the issue. If you only experience the problem in Fortnite, the chances are good that the issue is within Fortnite and you may be better served looking into their support forum.

It may also be worthwhile checking the driver version for your GPU, and perhaps going back to an earlier version, or updating to a later one.