NanoPi NEO 2 is a very cheap (15$) and very good single board computer featuring a 64 bit quad-core ARM CPU. The only drawback one might found is the CPU locked between 800 MHz and 1 GHz. Today I’ll teach your how to safely overclock your NEO 2 under Armbian.
To overclock the CPU edit
/etc/default/cpufrequtils to include:
overlay_prefix=sun50i-h5 overlays=cpu-clock-1.3GHz gpio-regulator-1.3v
ENABLE=true MIN_SPEED=408000 MAX_SPEED=1300000 GOVERNOR=ondemand
After a reboot your CPU should be able to run to at least 1 GHz depending on the revision of your board. The most recent boards can easily go up to 1.3 GHz and beyond.