nixos-config/hosts/monolith/undervolt.nix

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2024-07-06 18:32:29 -03:00
{ pkgs, ... }:
let
undervoltGpu = pkgs.writeShellScript "undervolt-gpu" ''
set -xe
cd $1
echo "manual" > power_dpm_force_performance_level
echo "1" > pp_power_profile_mode
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test -e pp_od_clk_voltage
echo "vo -100" > pp_od_clk_voltage
echo "c" > pp_od_clk_voltage
'';
in
{
boot.kernelParams = [ "amdgpu.ppfeaturemask=0xfffd7fff" ];
services.udev.extraRules = ''
ACTION=="add", SUBSYSTEM=="hwmon", ATTR{name}=="amdgpu", ATTR{power1_cap}="186000000", RUN+="${undervoltGpu} %S%p/device"
'';
}