I’m using a Jetson Nano Developer Kit B01 with a fresh install of Jetpack 4.4.1.
It’s powered through the barrel connector, using a 5.15V, 4A USB power brick.
Immediately after displaying the Desktop, a notification appears that says “System throttled due to Over-current.”
After acknowledging the warning, it disappears.
In the 10W power mode (“MAXN”), even just opening a Terminal window will bring the warning back.
The Nano consumes ~0.7A - 0.9A. Powering through the microUSB-Port does not change the behaviour.
I do not have a way know if the performance is actually reduced, yet.