nixos-config/modules/grub.nix

{ lib, ... }:

{
  boot.loader = {
    grub = {
      enable = lib.mkDefault true;
      version = 2;
      gfxmodeBios = "1920x1080,1920x1200,1024x768,auto";
      gfxpayloadBios = "keep";
      #memtest86.enable = true;
    };
    timeout = 2;
  };
}