I bet you get more nodes per shot? Not only 2 streams but lets say you have
one 2k stream and you can put about 30 nodes on that one.
So in theory lets say you use 10 nodes and render out you should get really huge speed.
To go really mad think about 4x 285 with two expanders.
But this is just my theory. BM could give some direction here 🙂
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Margus
https://iconstudios.eu