I did my custom carrier board for a Jetson Nano module with a DC-DC converter, providing 5V (and 5A) to the Nano module. My software uses a USB3 camera, powered by the same 5V. Power is clean and stable the whole time. The software processes every frame and the profiler shows that it uses around 50% of the time between frames.
But, if I set my voltage to exactly 5V, the software doesn’t work. It behaves as if the GPU was slower, it cannot process the data (although it can transfer it). If I increase the output to 5.2V, everything works fine.
I am talking about voltages measured directly at the pins of the connector for the module.
Looking at the output of tegrastats I can see the fields POM_5V_IN going from 1900 (sw not working) to ~2300 (sw working).
Does the speed of the Nano depend on the input voltage?