Question Will Windows 11 truly run two discrete GPUs?

[thegreatdelcamo]

I've a unique situation with my golf simulator. Four displays, thusly arranged...

1. GSPro on a 4K projector.
2. 4K monitor to analyze golf swings with high-speed cameras and that display is mirrored on a touch screen monitor so I can manipulate the swing, stopping it and moving it to see what happened.
3. Then, a FOURTH monitor that runs the ProTee launch-monitor software.

It happens that the integrated GPU on my Ryzen 7700X handles the ProTee monitor just fine. But I'm asking too much of my 4080 Super to run two 4K screens PLUS another. I've fussed with the two mirrored screens and reduced the resolution to some benefit.

So, I'm considering building a new system with a motherboard that has two PCIe 5.0 slots that will run 8x8 and using my 4080S in one and a 4070ti that I also have available. Then, the ProTee software can still run on the integrated GPU.

I am looking at the new 870 ProArt motherboard as a possibility. Or I could go to the Intel camp and get something like the ROG Maximus Z890 Apex, which I like because it has two additional PCIe 4.0 slots.

Thoughts? Any experience with successfully running two discrete GPUs?