Unable to set GPU affinity

So im running into an issue at the moment. Long story short, I have a system with 2X 3090s and none of the default.ini console commands, or the command line arguments, or EVEN nvidia settings are allowing my scene to load and render on the GPU I would like. The reason im doing this is so i can render scenes in parallel on each of my GPUs but seriously no matter what I do, my machine ALWAYS runs UE5 on GPU1. Anyone have any insight here?