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Aqsa
Associate II
June 23, 2026
Question

NUCLEO-N657X0-Q: NPU-Enabled AI Model Fails to Run and Shows Poor Performance

  • June 23, 2026
  • 0 replies
  • 17 views

Hi ,

I am currently working with the NUCLEO-N657X0-Q board and the STM32N6570-DK board. I am deploying and testing my machine learning models using STM32Cube AI Studio.

I have noticed something unusual. The model runs successfully on all target boards except the NUCLEO-N657X0-Q when the NPU is enabled. I am not sure why this is happening and would appreciate any insights or suggestions from the community.

Another issue is that the NUCLEO-N657X0-Q shows significantly higher inference/execution times compared to the other boards. Surprisingly, even a Cortex-M7-based board appears to perform better in some cases. This is unexpected, especially considering the capabilities of the Cortex-M55 and NPU.

Has anyone experienced similar behavior with the NUCLEO-N657X0-Q? Are there any known configuration issues, performance settings, memory considerations, or NPU-related limitations that I should check?

Any help or guidance would be greatly appreciated.

Thank you!