Dead By Daylight - GPU utilization too high compared to windows

[VeilSilence]

As title says, game utilize gpu at 95~97% in menu, when on Windows (DX12) it using ~65% for example.
Game also feels a bit laggy and framerate tend to degrade after some time of playing ( from 120fps to ~100 fps in menu for example at 97% gpu utilization).

Software information

Dead By Daylight ( Steam ). Ultra settings. 120fps. 2560x1440 resolution.
I did quick mangohud logging ( 3 minutes ) in menu.
Launch option: LD_PRELOAD="" gamescope -w 2560 -h 1440 mangohud gamemoderun %command%

DXVK Linux ( -dx11 in steam launch options ). ~71-80% GPU utilization in menu. MangoHud report:

Duration:180.6s
97% 129.1
AVG 119.9
1% 108.3
0.1% 101.3

VKD3D. 95-97% GPU utilization in menu.Mangohud report:

Duration:181.8s
97% 132.0
AVG 113.5
1% 93.4
0.1% 44.4

Frame time graph: https://flightlessmango.com/games/5522/logs/5423

Screenshots

VKD3D gpu utilization

VKD3D performance degrade after one test match

Win DX 12 gpu utilization

DXVK gpu utilization

System information

• GPU: Nvidia rtx 3090
• Driver: 555.52 Beta
• Wine version: Proton Experemental
• VKD3D-Proton version: Proton Experemental

Log files

Please attach Proton or Wine logs as a text file:
steam-381210-VKD3D.log

[HansKristian-Work]

Testing GPU utilization at a capped frame rate is flawed, the GPU clocks may not be the same. You need to test with fully unlocked frame rate to make sure GPU clocks are comparable. Even then, I expect NVIDIA to lose performance here compared to native, but not 30%. It's a known issue that we cannot solve ourselves.

[VeilSilence]

Testing GPU utilization at a capped frame rate is flawed, the GPU clocks may not be the same. You need to test with fully unlocked frame rate to make sure GPU clocks are comparable. Even then, I expect NVIDIA to lose performance here compared to native, but not 30%. It's a known issue that we cannot solve ourselves.

Understandable. Dead by daylight just frame capped by design at 120fps, so I cannot "uncap" in normal way, unless I can bypass this somehow on Linux.
Is nvidia devs acknowledged about this, or should I make report about that?