NSight Capture Crashes with NvRTX5.6 branch

[guanning79]

Hi,

I’m testing the MegaGeometry system with the latest NvRTX_5.6 branch and wanted to capture a frame to have a deeper look at the GPU buffers. But when I captured with NSight Graphics, there were many GPU crashes.

So I created an empty project and tried to narrow down the issue. Actually, what’s surprising me is that it’s quite easy to reproduce the GPU crash, and there was no such GPU crash when I followed the same steps with an official UE5.6 build.

My working environment is as follows:

GPU: RTX4080

UE Branch: https://github.com/NvRTX/UnrealEngine/tree/nvrtx-5.6 locally built

NSight Version: 2025.4.1

The repro steps are as follows:

1. Create a new project using NvRTX5.6 UnrealEditor

   

2. Start NSight Graphics as administrator.

3. Launch and automatically attach an UnrealEditor process

   

4. Pick an item in the default level

   

5. Crash happens after clicking the Capture button.

6. Or create and save a new basic level.

   

7. It also crashes when capturing

I have also attached two crash data folders.

If you can’t repro the issue, I can share my local testing project. Let me know if you have anything that needs to be clarified.

Thank you!

Crashes.zip (377.1 KB)