Isaac Sim 4.5 Freezing (Not Responding) on RTX 5050 Laptop GPU – Iray Photoreal Unsupported

[bnina.ayoub]

Isaac Sim Version: 4.5.0

Operating System: Windows 11

GPU Information:

• Model: NVIDIA GeForce RTX 5050 Laptop GPU

• Driver Version: Latest (Studio/50-series driver)

• VRAM: 8 GB

System Information:

• RAM: 24 GB

• CPU: Intel i7 14th Gen

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Detailed Description:
I’m experiencing a freeze when launching Isaac Sim 4.5 on my laptop. The application becomes Not Responding shortly after showing the menus, even when the stage is completely empty. Task Manager shows 0% GPU usage during the freeze.

From the logs, the following warning appears repeatedly:

[rtx.neuraylib.plugin] [IRAY:RENDER] GPU 1 (NVIDIA GeForce RTX 5050 Laptop GPU) with CUDA compute capability 12.0 is unsupported by this version of Iray photoreal. Please look for an update with your software provider.

Even when launching with:

--/renderer/activeRenderer=HydraStorm

to bypass Iray, the freeze still occurs. Both launching via isaac-sim.bat and the Isaac Sim Selector result in the same behavior.

Expected Behavior:
I expect Isaac Sim 4.5 to open the menus and allow me to interact with an empty stage without freezing, even if RTX features are unavailable.

Actual Behavior:
Isaac Sim freezes (“Not Responding”) after startup, and the GPU is not utilized.

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Steps to Reproduce:

1. Launch Isaac Sim 4.5 via isaac-sim.bat or Isaac Sim Selector on Windows 11.

2. Observe application launch.

3. Wait a few seconds after menus appear — the application freezes.

4. Check Task Manager → GPU usage remains at 0%.

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Error Messages:

[rtx.neuraylib.plugin] [IRAY:RENDER] GPU 1 (NVIDIA GeForce RTX 5050 Laptop GPU) with CUDA compute capability 12.0 is unsupported by this version of Iray photoreal. Please look for an update with your software provider.
[rtx.scenedb.plugin] SceneDbContext : TLAS limit buffer size ...

(Additional TLAS / SceneDb warnings appear in logs.)

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Screenshots or Videos:

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Additional Information

What I’ve Tried:

• Launching with --/renderer/activeRenderer=HydraStorm and RayTracedLighting.

• Disabling RTX / Iray features in the Extension Manager.

• Updating NVIDIA Studio drivers to latest version.

• Ensuring Isaac Sim runs on the NVIDIA GPU via Windows Graphics Settings.

Related Issues:

• None officially documented for RTX 50-series + Isaac Sim 4.5 compatibility.

Additional Context:

• Laptop hardware: RTX 5050 Laptop GPU, 8 GB VRAM (minimum as specified in docs), 24 GB RAM, i7 14th Gen.

• Stage is empty — issue occurs immediately on startup.

• Suspect 4.5 does not support CUDA 12.0 GPUs, causing Iray plugin to fail and freeze application.

[VickNV]

Please refer to 5070ti GPU cannot be used in isaac sim 4.5.0 and upgrade to Isaac Sim 5.0.0.

[bnina.ayoub]

Yes, it worked. The freeze still occurred in 5.0 because Isaac Sim was downloading and processing assets the first time it was opened. I confirmed this by observing the high CPU and disk usage. After a few minutes, it started working normally.