How can I have a single (logical) desktop surface, and have it display on multiple (three) physical monitors, in Windows 7, like this:

duplicate display image

No 3rd party software and no external hardware. Using Windows only.

This is my current setup:

  • 2 Nvidia GT710 Graphic cards
  • Latest driver installed.
  • Each graphic card has 1 HDMI, 1 DVI, 1 VGA.
  • Extended mode works fine, e.g., I can clone 2 screens and extend 1.
  • 1 Monitor on HDMI at card 1
  • 1 Monitor on HDMI at card 2
  • 1 Monitor on VGA at card 2

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