The g2 is plugged into the GPU that WMR is forced onto, and the monitor is plugged into the other GPU that MSFS is forced to. So when not in VR mode it’s just one 1080ti and runs ok enough for me on all settings, a screen, fine. But VR is such a beast.
I tried out ithis GPU split in VR having MSFS in full screen, windowed, windowed cursor off, monitor off and it didn’t make a noticable difference and its good enough so long as I don’t push MSFS to the next level of graphics.
I also put all svchost processes on to the non-MSFS GPU, not sure how to run MSFS without steam involved but will try that too. WMR itself seems highly efficient compared to steamvr but I think its because it came from the hololens wheras steam came from legacy gaming and added VR.