#  xrandr
Screen 0: minimum 320 x 200, current 3600 x 1080, maximum 8192 x 8192
DVI-I-1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 494mm x 320mm
   1680x1050      59.9*+
   1280x1024      75.0     60.0
   1280x960       60.0
   1152x864       75.0
   1024x768       75.1     70.1     60.0
   832x624        74.6
   800x600        72.2     75.0     60.3     56.2
   640x480        72.8     75.0     66.7     60.0
   720x400        70.1
DVI-I-2 connected 1920x1080+1680+0 (normal left inverted right x axis y axis) 1600mm x 900mm
   1920x1080      60.0*+   50.0
   1280x1024      60.0
   1280x720       50.0     60.0
   1024x768       60.0
   800x600        60.3
   640x480        60.0