Fps weirdly fluctuating when fps is high

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sw333

Forum regular
Hi. Pc:
13900K stock
2x16 GB DDR5 GSKILL 6800
Rtx 4090 Gigabyte Gaming
Aorus Elite Z790 AX
SSD KINGSTON 2TB
Seasonic 1300W PX ATX 3.0 PCIE 5.
updated drivers
win 11



My performance is ok for me. Smooth. But i have weird issue. I am using: 1440P,DLSS QUALITY,FRAME GENERATION ON,PATH TRACING ON,RT PSYCHO, DLSS 3.5 reconstruction.
And i have between 130-170fps in city and outside. Ok. But. When i have 170 fps and i dont do anything on screen. I mean i just stop and not touching mouse and keyboard, fps fluctuating and jumping weirdly. Like 165-160-150-165-155-170. And nothing happening on screen. Gpu usage is normal 98%. Is this normal?
I made benchmark and there is fine no fluctuation. Only in game sometimes.s THxx

Also cpu temps 60-70C. Gpu temp 55C. No throttling
 
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