rprice /xorg.conf

my xorg.conf with nvidia driver information running on a x86_64 bit xen kernel
# Xorg configuration created by system-config-display
# BlankTime is in minutes. For GDM purposes
# Comment all HorizSync and VertSync values to use DDC:

Section "ServerLayout"
        Identifier     "Multihead layout"
        Screen      0  "Screen0" LeftOf "Screen1"
        Screen      1  "Screen1" 0 0
        InputDevice    "Keyboard0" "CoreKeyboard"
        Option         "Xinerama" "off"
        Option         "Clone" "on"
        Option         "BlankTime"     "1"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option      "XkbModel" "pc105"
        Option      "XkbLayout" "us"
EndSection

Section "Monitor"
        Identifier   "Monitor1"
        VendorName   "Monitor Vendor"
        ModelName    "LCD Panel 1024x768"
        HorizSync    31.5 - 48.5
        VertRefresh  40.0 - 70.0
        Option      "dpms"
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "nvidia"
EndSection

Section "Device"
        Identifier  "Videocard1"
        Driver      "nvidia"
        VendorName  "Videocard Vendor"
        BoardName   "nVidia Corporation NV44 [Quadro NVS 285]"
        BusID       "PCI:7:0:0"
        Screen      1
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        Monitor    "Monitor1"
        DefaultDepth     24
        Option     "TwinView" "1"
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1280x1024"
        EndSubSection
EndSection

Section "Screen"
        Identifier "Screen1"
        Device     "Videocard1"
        Monitor    "Monitor1"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1280x1024"
        EndSubSection
EndSection