Manual_Overclocking.md

To manually set the CPU frequency in Armbian, follow these steps:

Check Available Frequencies and Governors

1. Open a terminal and check the available frequencies:

   cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

2. Check the available governors:

   cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors

Set CPU Governor

To set the CPU governor to performance, powersave, or another mode:

echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

Manually Set Frequency

To manually set a specific frequency:

echo <desired_frequency> | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq
echo <desired_frequency> | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_min_freq

For example, to set the CPU to 1.8GHz:

echo 1800000 | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq
echo 1800000 | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_min_freq

Make Settings Persistent

To apply these settings at boot:

1. Edit /etc/rc.local:

   sudo nano /etc/rc.local

2. Add the following before exit 0:

   echo 1800000 > /sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq
   echo 1800000 > /sys/devices/system/cpu/cpu*/cpufreq/scaling_min_freq
   echo performance > /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

3. Save and exit, then reboot:

   sudo reboot