New Nvidia driver just released that allows GSYNC to work in window mode, will try this in a bit.
http://www.nvidia.com/download/driv...?ClickID=cp4e4qalf7lkwa4ekqqvzivixpvnza4fensn
http://www.nvidia.com/download/driv...?ClickID=cp4e4qalf7lkwa4ekqqvzivixpvnza4fensn



, I wonder is it the framebuffer size on the Gsync module? It's big enough to handle the DSR output in a single card configs but not SLI. 
