VP render machine

I am working on a VP studio which has two LED screens, one the back wall (2304x1152) and another which is a floor (1280x896). They are both set up in nDisplay running off one render machine (A6000, 32GB RAM). We are using Mo-Sys VP Pro software with StarTracker.

Scenes which we have putting in are very laggy and I am wondering on the hardware side, if we get another GPU would we see speed boosts and would we need an NVlink for this singe render machine? Do you think having more RAM will also help when showing content on the LED screens?

Thank you for you help.