Section "Extensions"
  Option "Composite"  "Enable"
  Option "RENDER" "Enable"
EndSection

then, in your device section, add the marked line:
Section "Device"
    Identifier  "nVidia GeForce 4 440 Go"
    Driver  "nvidia"
    Option  "NvAGP"  "0"
    Option  "CursorShadow"  "on"
    Option  "NoLogo"  "true"
    Option  "RenderAccel" "true" #this is the line to add

    Option "IgnoreEDID" "true"
    Option "NoDDC" "true"
EndSection