Xorg.conf

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Shimian"
    ModelName      "QHD270"
    HorizSync      88.8
    VertRefresh    59.5
    Option         "DPMS"
    Modeline       "2560x1440" 241.50  2560 2608 2640 2720  1440 1443 1448 1481 +hsync -vsync
    DisplaySize    597 336  
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 460"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "NoLogo" "True"
    Option         "TwinView" "1"
    Option         "TwinViewXineramaInfoOrder" "DFP-0"
    Option         "UseEDID" "False"
    Option         "UseEDIDDPI" "False"
    Option         "UseEDIDFreqs" "False"
    Option         "ExactModeTimingsDVI" "True"
    Option         "metamodes" "DFP-0: 2560x1440_60 +0 +0, DFP-2: 1920x1080 +2560+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

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