nix/modules/system/hardware/amd.nix

{ pkgs, ... }:

{
  boot.initrd.kernelModules = [ "amdgpu" ];

  hardware.graphics.enable = true;
  hardware.graphics.extraPackages = with pkgs; [
    amdvlk
    mesa.drivers
  ];

  hardware.graphics.extraPackages32 = with pkgs; [
    driversi686Linux.amdvlk
  ];

  programs.gamemode.enable = true;
}