Hi,
We've run into this issue as well when the VOXL-CAM is sitting on a desk, for which we've designed this cooling stand. As for when the cam is in motion on a body, we've only flown it on the seeker where the propwash is enough to keep the unit cool enough to utilize all of the cores fully. The cam unit wasn't designed around that smaller fan, we use that primarily on our other platforms with an open board where we can direct air directly onto the board.
As for QVIO, we've also seen this behavior when cores shut down, but we try to avoid overheating at all costs, and generally don't carry any expectation for software to continue operating properly once the pmic is shutting down cores.
Generally, I'd recommend :
Trying to make sure that the cam is placed on a spot on your drone with as much airflow as possible Optimizing your code as much as possible to minimize CPU utilization Download the latest software release (3.8.0-0.7) from here since we've spent most of the last year improving and optimizing our services and libraries and there should be significant improvements since 3.3.0 was released