Asus WS C422 PRO Manual page 118

Enabling SLI settings
®
From the NVIDIA Control Panel window,
select Configure SLI, Surround, PhysX.
In the Quad-SLI enabled, click Maximize
3D Performance SLI to set the display
for viewing SLI rendered content. When
®
done, click Apply.
5-10 Chapter 5: Multiple GPU Support