Is it possible to use the video memory of two 4090s and full speed of one for Unreal Engine rendering?

I think at this point I’ll just say this is probably out of my depth. You’re dealing with systems features that I’m just not familiar with and I haven’t seen a lot of people using to begin with. It very well may work, but I don’t know anything about them. I might try finding out which team was in charge of the feature set, looking for a feedback thread, and asking them directly?