UE 5.6.1 crash at 87% when running DX12 (works only with -dx11)

Development Platform & Builds
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Hi everyone,

I’m running into a crash problem with Unreal Engine 5.6.1 and DirectX 12.

  • Issue: When I try to open a project in UE 5.6.1 using the default DX12, the editor always crashes at 87% loading and show up “GPU Crashed or D3D Device Removed” .

  • Workaround: If I add -dx11 (or -d3d11) to the Unreal shortcut, the editor works fine. I can also open UE from Epic Games Launcher or shortcut normally, but when opening a project it crashes unless I force DX11.

  • Other versions: I tested UE 5.5.4 and everything works perfectly in DX12 — no crash.

  • GPU/Drivers: AMD Radeon RX 6800 XT with the newest driver (Adrenalin 25.9.1). I want to use DX12 since my GPU works very well with it in other applications.

  • Tried fixes (no success):

    • Adding TdrDelay in Windows Registry

    • Extending virtual memory

    • Updating graphics drivers (clean install)

    • Searching YouTube / Google for solutions

  • System details:

    • OS: Windows 11

    • CPU: ryzen 5 7500f

    • RAM: 16GB DDR5

    • GPU: AMD RX 6800 XT (driver 25.9.1)

It looks like only UE 5.6.1 is affected — earlier versions are fine. Could this be a 5.6.1 bug with DX12, an AMD GPU compatibility issue, or something else?

Any suggestions or workarounds (other than sticking with DX11) would be much appreciated.

Thanks in advance!