At least for digital asics, if you can control the temperature and core voltages one strategy to determine if the issue is hardware is to see if the problem cha

At least for digital asics, if you can control the temperature and core voltages one strategy to determine if the issue is hardware is to see if the problem changes (either stops or happens more frequently) at high temperature/low core voltage compared to low temperature/high voltage. That's usually a pretty good sign it's not a software/firmware problem. If you can't modify the voltage to the datasheet operating limits, you can try just temperature, but in my experience it's better to do both.