To use multiple displays to increase your desktop size and be able to configure each display independently
Make sure you have securely connected the additional displays you want to use to your computer.
Verify that your displays are plugged in and turned on.
From the NVIDIA Control Panel navigation tree pane, under Display, click Set up multiple displays to open the page.
The box under Step 1 lists all the displays that are connected to your system, and shows to which GPU they are connected.
Check or clear the check boxes to select the displays that you want to use.
In non-SLI modes, you can select up to two displays per GPU.
In SLI mode with GeForce 8 series and later GPUs, you can select up to two displays connected to GPUs within the same SLI group. Under 4-way SLI mode, only GPUs that have two display connectors can be used to drive displays. Typically, display connectors lined up on the same slot position are connected to the same GPU.
Icons in the box under Step 2 appear, corresponding to the displays you selected.
Click Apply to activate the new display configuration.
You can click and drag the display icons to match the physical position of your displays.
Note: If any one of your displays isn't showing an image, make sure to repeat steps 1. and 2. If that doesn't work, restart your computer and repeat the above steps.