Someone

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    Option         "Xinerama" "0"
EndSection

Section "Monitor"
    Identifier     "Monitor1"
    ModelName      "DELL ?"
    HorizSync       30.0 - 83.0
    VertRefresh     56.0 - 75.0
    Option         "DPMS"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    ModelName      "DELL E228WFP"
    HorizSync       30.0 - 83.0
    VertRefresh     56.0 - 75.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "UseInt10Module" "1"
    Option         "TwinView" "True"
    Option 	   "ConnectedMonitor" "DFP-1, DFP-0"
   #Option 	   "MetaModes" "1600x1024 +0+1600, 1600x1024 +0+0"
   #Option 	   "MetaModes" "1600x1024,1600x1024"
   Option         "MetaModes" "nvidia-auto-select, nvidia-auto-select"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection