White cube production fully proliferated (1820 cubes/min)
1820 white cubes per minute in a square foot print, Colored cubes, anti-matter, and outgoing white cubes are proliferated.
For thinner latitudes, my 900+ version is available here: https://www.dysonsphereblueprints.com/blueprints/factory-universe-matrix-production-with-proliferator-900-min-25-boost