I can’t answer if the power rail in question is within tolerance. However, the normal symptom of a power rail with either voltages fluctuating too fast or too far is a system suddenly shutting down. I don’t think the overcurrent is an indication of that. If you don’t have enough thermal dissipation though, you might see that warning…but you’d see it in max power mode, and not in lower power modes.
The message is very very likely just a result of the Jetson trying to keep within the power profile you set. Reducing clock speeds will be the main result of seeing that message. Some combination of CPU power consumption and/or GPU power consumption is being regulated when that message occurs, but I’ve never known it to be due to insufficient power rail voltage (but system suddenly shutting down is a result you’d see from insufficient power).
Unless you are running in max power mode I think it is extremely unlikely that even a modest heat sink would ever be a problem. Most Jetsons, when initially starting, won’t even turn a fan on because they produce so little heat. I suppose running computations could be called GPU or CPU “heavy” in the sense that the CPU or GPU will consume more power if more clock cycles are used in a given time for computations, but this isn’t any kind of “pathologic” issue…this is how it was written, and perhaps the message itself is misleading.
You could run tegrastats while some computation is running to see GPU performance, but I don’t know of anything that would directly tell you some specific reason for that warning. I can tell you that 50C is far below maximum, and there isn’t any chance that 50C is harmful, nor is it a reason for thermal throttling…the message wording is misleading.
If you want to ask someone about specific rails and voltage tolerances, then I’d suggest a thread on that topic.