====== Ubuntu - GPU - AMD GPU - Overclocking - Manually ======

<WRAP info>
**NOTE:**  In sysfs, paths like **/sys/class/drm/...** are just symlinks and may change between reboots.

  * Persistent locations can be found in **/sys/devices/**, e.g. **/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/**.
 
Adjust the commands accordingly for a reliable result.

</WRAP>

----

===== To set the GPU clock for the maximum P-state 7 to 1209MHz and 900mV voltage =====

<code bash>
echo "s 7 1209 900" > /sys/class/drm/card0/device/pp_od_clk_voltage
</code>

----

===== To set the VRAM to maximum P-state 2 =====

<code bash>
echo "m 2 1850 850" > /sys/class/drm/card0/device/pp_od_clk_voltage
</code>

<WRAP important>
**WARNING:** Double check the entered values, as mistakes might instantly cause fatal hardware damage!
</WRAP>

----

===== To apply =====

<code bash>
echo "c" > /sys/class/drm/card0/device/pp_od_clk_voltage
</code>

----

===== To check if it worked out, read out clocks and voltage under 3D load =====

<code bash>
watch -n 0.5  cat /sys/kernel/debug/dri/0/amdgpu_pm_info
</code>

----

===== Reset to the default values =====

<code bash>
echo "r" > /sys/class/drm/card0/device/pp_od_clk_voltage
</code>

<WRAP info>
**NOTE:**  It is also possible to forbid the driver to switch to certain P-states, e.g. to workaround problems with deep powersaving P-states like flickering artifacts or stutter.

  * To force the highest VRAM P-state, while still allowing the GPU itself to run with lower clocks: <code bash>
echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level
echo "2" >  /sys/class/drm/card0/device/pp_dpm_mclk
</code>

</WRAP>

----

===== Allow only the three highest GPU P-states =====

<code bash>
echo "5 6 7" >  /sys/class/drm/card0/device/pp_dpm_sclk
</code>

----

===== To set the allowed maximum power consumption of the GPU to e.g. 50 Watts =====

<code bash>
echo 50000000 > /sys/class/drm/card0/device/hwmon/hwmon0/power1_cap
</code>

<WRAP info>
**NOTE:**  The above procedure may have different behavior or bugs with different GPUs.
</WRAP>