Hi everyone,
I’m facing serious stability issues with my brand new Jetson Thor and I’m trying to understand whether this is a hardware, power, or software problem.
The system reboots instantly (no alerts, no warnings, no logs) under specific conditions and sometimes even randomly.
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When I run models on Ollama:
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large models (e.g. gpt-oss:120b) reboot the board almost immediately
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smaller models (e.g. qwen3:4b) allow 1–2 responses, then the system reboots
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When I generate images with ComfyUI (e.g. Flux or similar models), the system reboots as soon as generation starts
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Every time I connect a 2.5" magnetic HDD via USB, the system reboots immediately; after reboot, the drive is accessible and works normally
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The board can also reboot randomly even when I’m not doing anything heavy
I also ran some tests that did NOT cause reboots:
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CPU stress (stress-ng) → stable
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Light CUDA test (small torch tensor on GPU) → stable
Crashes seem to be triggered by sustained GPU + memory load or by USB power draw (e.g. HDD spin-up), but they can also occur randomly, although less frequently.
Could this indicate power delivery instability (even with the original PSU)? Or could it still be software-related? Does the fact that the board reboots instantly clearly point to a hardware/power issue?
Any help to understand or isolate the problem, and suggestions on how to fix it, would be greatly appreciated.
Thanks!