Intresting. I've never had an issue with stability or high tempratures using the default clocks. As underclocking is a personal choice, I wont be rolling this out with DietPi. As we use Loboris image, if he makes the decision to impliment it, it would then be applied to DietPi installations aswell.
DietPi-Config allows you to limit the maximum CPU frequencies and gets applied automatically during boot.
Although the current kernel doesnt supply us with scaling_available_frequencies to generate a list, you can manually set the value (1200mhz):
code:
- nano /DietPi/dietpi.txt
Change:
cpu_max_frequency=1200
The above would then be applied after a reboot and during every boot. Use the following to check freqs: