Rtx 5090 GPU Locked or D3D Device Removed (GPU Crash dump Triggered)

System
Windows 11
Directx 12
Gainward Phantom 5090
1500w psu
Amd Ryzen 7 9800X3D
GSKILL 48GB (4x24GB) 96GB

I tried both, game and studio drivers of Nvdia but same crush happens everytime.
sometimes even before opening the project sometimes after 20 seconds.
How can i fix that problem?
Thanks in advance
Umut

Log:
GPU Crash dump Triggered

UnrealEditor_D3D12RHI
UnrealEditor_D3D12RHI
UnrealEditor_D3D12RHI
UnrealEditor_D3D12RHI
UnrealEditor_D3D12RHI
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll