Is there a way to monitor the current CPU core voltage and overclock, similarly to CPU-Z but for the raspberry pi? This is so I can check that nothing is limiting the overvolt or overclock.
These commands should do it.
vcgencmd measure_clock arm vcgencmd measure_volts core
If you like to monitor them in realtime, you can use
watch -n1 "vcgencmd measure_clock arm && vcgencmd measure_volts core
or you can add a cronjob to write it inside file.
Is that what you are looking for?