• Diagnostic commands for AMD graphics cards

• https://wiki.archlinux.org/index.php/AMDGPU#Overclocking

• https://blog.tingping.se/2018/12/01/amdgpu-fullrgb.html

sudo watch --interval '0.5' cat '/sys/kernel/debug/dri/0/amdgpu_pm_info'

cat '/sys/class/drm/card0/device/pp_od_clk_voltage'

• 7 is the highest available PSTATE for SCLK
• 1386 is the value for SCLK for that PSTATE
• 1155 is the voltage/VDDC for the specified SCLK for that PSTATE
• When the highest PSTATE is used, the GPU Core will run at 1386MHz @ 1155mV
• This does not take effect immediately

echo 's 7 1386 1155' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage'

• 2 is the highest available PSTATE for MCLK
• 2025 is the value for MCLK for that PSTATE
• 955 is the voltage/VDDC for the specified MCLK for that PSTATE
• When the highest PSTATE is used, the GPU Memory will run at 2025MHz @ 955mV
• This does not take effect immediately

echo 'm 2 2025 955' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage'

• Check if the specified values look alright

cat '/sys/class/drm/card0/device/pp_od_clk_voltage'

• Be absolutely certain the values above looked alright
• It is very well possible to destroy hardware with this if the values are too high

echo 'c' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage'

• Runs glxgears without VSync, thus allowing the GPU to enter the highest PSTATE automatically
• Queries power info live every 0.5s

vblank_mode='0' glxgears

sudo watch --interval '0.5' cat '/sys/kernel/debug/dri/0/amdgpu_pm_info'

• Sets all CLKs and VDDCs to card defaults and commits it

echo 'r' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage' && echo 'c' | sudo tee '/sys/class/drm/card0/device/pp_od_clk_voltage'

• PSTATE will be manually controllable
• TODO: auto makes sense as the default for this?

echo 'manual' | sudo tee '/sys/class/drm/card0/device/power_dpm_force_performance_level'

cat '/sys/class/drm/card0/device/power_dpm_force_performance_level'

• Can allow either a single PSTATE, or multiple to be automatically selected for SCLK based on GPU load

echo '7' | sudo tee '/sys/class/drm/card0/device/pp_dpm_sclk'

echo '5 6 7' | sudo tee '/sys/class/drm/card0/device/pp_dpm_sclk'

• Can allow either a single PSTATE, or multiple to be automatically selected for MCLK based on GPU load

echo '2' | sudo tee '/sys/class/drm/card0/device/pp_dpm_mclk'

echo '1 2' | sudo tee '/sys/class/drm/card0/device/pp_dpm_mclk'

cat '/sys/class/drm/card0/device/hwmon/hwmon'*'/power1_cap'

cat '/sys/class/drm/card0/device/hwmon/hwmon'*'/power1_cap_max'

• This makes fun assumptions, but theoretically shouldn't allow the power cap to go above levels stated in the firmware; might not be dangerous

echo "$(cat '/sys/class/drm/card0/device/hwmon/hwmon'*'/power1_cap_max')" | sudo tee '/sys/class/drm/card0/device/hwmon/hwmon'*'/power1_cap' > '/dev/null'

echo "$(cat '/sys/class/drm/card1/device/hwmon/hwmon'*'/power1_cap_max')" | sudo tee '/sys/class/drm/card1/device/hwmon/hwmon'*'/power1_cap' > '/dev/null'