Mine

Section "Monitor"
  Identifier   "Monitor0"
  VendorName   "Dell"
  ModelName    "Dell 2007WFP (Digital)"
  HorizSync    30.0 - 81.0
  VertRefresh  56.0 - 76.0
  Option      "dpms"
  Option       "CalcAlgorithm" "CheckDesktopGeometry"
  UseModes      "16:10"
EndSection

Section "Device"
  Identifier  "Videocard0"
  Driver      "vesa"
  VendorName  "nVidia"
  BoardName   "GeForce 6600 GT"
  Option      "FlatPanelProperties" "Scaling = aspect-scaled"
EndSection

Section "Screen"
  Identifier "Screen0"
  Device     "Videocard0"
  Monitor    "Monitor0"
  DefaultDepth     24
  SubSection "Display"
    Depth     16
    Modes    "1680x1050" "1600x1200" "1280x1024" "1024x768" "800x600"
  EndSubSection
  SubSection "Display"
    Viewport 0 0
    Depth     24
    Modes    "1680x1050" "1280x800"
  EndSubSection
EndSection