12/27/2023 0 Comments Linux amdgpu memory monitorThis will be different on Vega and Navi GPUs. There are eight (0-7) GPU clock states and two (0-1) OR three (0-2) memory states on AMD RX GPUs. HOWTO See Available GPU Clock And Memory States And Their Values Next, check what GPU and memory clock states are available: profile_peak sets all clocks (mclk, sclk, pcie) to the highest levels." profile_min_mclk forces the mclk to the lowest level. profile_min_sclk forces the sclk to the lowest level. profile_standard sets the clocks to a fixed clock level which varies from asic to asic. This mode is recommended for profiling specific work loads where you do not want clock or power gating for clock fluctuation to interfere with your results. "When the profiling modes are selected, clock and power gating are disabled and the clocks are set for different profiling cases. The available power_dpm_force_performance_level settings other than manual areįorces the lowest possible clock and locks the GPU thereįorcest the highest possible clock and locks the GPU there You will need to run that command, and every other command that changes amdgpu module settings, as root (or using sudo, although in some cases it doesn't work). You will get write error: Invalid argument errors when writing clock values if you don't.Įcho "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level The first thing you need to do before you can change anything is to set /sys/class/drm/card0/device/power_dpm_force_performance_level to manual to enable manual control. The Quick And Easy Way To Manually "Undervolt" AMD GPUs We had to disconnect all but one screen to write this guide.Ĭommands like: echo "0 1 2 3 4 5" > /sys/class/drm/card0/device/pp_dpm_sclk return write error: Invalid argument if two or more screens are connected while it does work with just one (assuming you have the amdgpu.ppfeaturemask=0xfffd7fff kernel parameter and you sent manual to /drm/card0/device/power_dpm_force_performance_level). That is very unfortunate but it is what it is. You can write values to this file and then activate them.Ī Single-Monitor Setup Is Required Īmdgpu will not let you change settings on multi-monitor setups. Booting with this will make a special file called /sys/class/drm/card0/device/pp_od_clk_voltage appear. Enum PP_FEATURE_MASK Īmdgpu.ppfeaturemask=0xfffd7fff works if you want to adjust clocks and voltages.
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