Section "Monitor"
      Identifier   "Monitor0"
      VendorName   "1920x1080_60.00"
      ModelName    "1920x1080_60.00 Hz"
      # 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
      Option      "DPMS"
   EndSection

   Section "Screen"
      Identifier "Screen0"
      Device     "Card0"
      Monitor    "Monitor0"    # Монитор, который определили выше
      DefaultDepth     24
      SubSection "Display"
         Viewport   0 0
         Depth     24
         Modes    "1920x1080_60.00"  # Режим определенный выше строчкой Modeline      EndSubSection
   EndSection