xorg.conf

Section "Files"
        ModulePath "/usr/lib32/xorg/modules"
        ModulePath "/usr/lib64/opengl/nvidia"
        ModulePath "/usr/lib64/xorg/modules"
EndSection
Section "InputClass"
        Identifier      "keyboard-all"
    Option          "XkbLayout" "it"
        MatchIsKeyboard "on"
EndSection
Section "Monitor"
    Identifier  "DVI0"
    Option      "LeftOf"    "DVI1"
EndSection

Section "Monitor"
    Identifier  "DVI1"
    Option      "LeftOf"    "HDMI"
EndSection

Section "Monitor"
    Identifier  "HDMI"
EndSection

Section "Device"
    Identifier  "Card0"
    Driver      "nvidia"
    Option      "Monitor-DVI-I-1" "DVI0"
    Option      "Monitor-DVI-D-0" "DVI1"
    Option      "Monitor-HDMI-0" "HDMI"
EndSection