What happens when you have multiple GPUs setup in a system without SLI and you run a monitor off of each GPU independantly?

For example: Say I have Monitor A and Monitor B plugged into GPUs A and B. Run the OS in Extended Display Mode and finally open a 2D or 3D graphgical application where the application's window is half way on both Monitor's A & B?

My speculation: Only one GPU will render. OR Each GPU fully renders the application on it's respective display and anything outside of the GPUs' display bounderies is truncated.


At least for all the Windows and Linux versions I'm familiar with: only one GPU will render. When it finishes rendering a frame, the parts of that frame that are on the other display will be sent, through the motherboard, to the other graphics card's frame buffer.

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