[UE5.8.2][D3D12][AMD] Directional Light RT Shadow causes GPU crash

General Issues and Bug Reporting (Unreal Engine)
1

Summary

Enabling hardware ray-traced shadows on a Directional Light in a blank project causes the official UE 5.8.2 editor to GPU-crash on an AMD Radeon 8060S. The official UE 5.7 build has the same issue on the same machine.

What Type of Bug are you experiencing?

Rendering (Graphics / Niagara)

Steps to Reproduce

  1. Launch the official Epic Games Launcher UE 5.8.2 editor (CL 56702186).
  2. Create a new Blank project and open it using DirectX 12.
  3. In the level, select or add a Directional Light.
  4. In the Directional Light details, set Ray Traced Shadows / RT Shadow to Enabled.
  5. The editor crashes.

Expected Result

The Directional Light should render with hardware ray-traced shadows and the editor should remain running without a GPU crash.

Observed Result

The official UE_5_8.log records a GPUCrash. After ray tracing is enabled and Persistent SBTs are recreated, Device 0 is removed with DXGI_ERROR_DRIVER_INTERNAL_ERROR. Ray-tracing RTPSO creation then fails with DXGI_ERROR_DEVICE_REMOVED and Reason: DXGI_ERROR_DRIVER_INTERNAL_ERROR at D3D12RayTracing.cpp:701.

Affects Versions

5.8

Platform(s)

Windows

For crash reports, include your callstack

GPU Crash dump Triggered
CrashType: GPUCrash
UnrealEditor_D3D12RHI
ntdll

The crash context PCallStack is empty; the D3D12 log reports the device removal and RTPSO creation failure above.

Additional Notes

Evidence source: the official Epic Games Launcher UE 5.8 project, not a MooaToon project or log.

Engine: UE 5.8.2-56702186+++UE5+Release-5.8, Installed Engine Build: 1

System information:

  • OS: Windows 11 Home 25H2, 10.0.26200.9445
  • Computer: ASUS ProArt PX13 HN7306EA
  • CPU: AMD RYZEN AI MAX+ 395 with Radeon 8060S
  • Memory: 95.65 GB installed
  • GPU: AMD Radeon™ 8060S Graphics, PCI vendor/device 1002:1586
  • AMD driver: AMD Software: Adrenalin Edition 25.20.32.06, internal/unified 32.0.22032.6002, driver date 2025-12-15
  • RHI: D3D12, Shader Model 6, DirectX Raytracing Tier 1.1, bindless resources enabled

The same Directional Light hardware ray-tracing reproduction also fails with the official UE 5.7 build on this machine. A sanitized local archive containing the official UE 5.8 log, CrashContext.runtime-xml, UEMinidump.dmp, and GPU breadcrumbs is available if additional files are needed.

1 Like
2

Update / workaround:

Adding -clearPSODriverCache to the command line prevents the crash.

After adding this option, enabling Directional Light RT Shadows no longer crashes in:

  • Official Epic UE 5.8.2 Launcher build (CL 56702186)
  • UE source build
  • UE Installed Build

Without this option, the same tests reproduce GPUCrash / DXGI_ERROR_DRIVER_INTERNAL_ERROR during ray-tracing RTPSO creation.

This strongly suggests that a stale or corrupted AMD driver PSO cache is involved. -clearPSODriverCache is a workaround for now; the underlying cache invalidation or driver interaction still needs investigation.

3

This is a very detailed report. The fact that the same hardware ray-tracing issue also reproduces on the official UE 5.7 build makes it seem less likely to be specific to the project itself.

The combination of the D3D12 device removal, RTPSO creation failure, and AMD Radeon 8060S is especially useful information. Hopefully the attached logs and GPU crash dump can help narrow down whether this is an engine or driver-level issue.