@MiRai - do you use FX windows much? Do you know if there is a tax on the GPU for using them?

I ask as the frame droppage I only saw when I was doing stacked full screen with 4x FX overlays for the slaves.

If I do a standard 1 + 1x4 window layout for the master and slaves without FX windows I can run the master on ultra np without the slaves dropping frames. I thought maybe my config was broken or FX is a performance hit.