Every recipe that produces Heavy Modular Frame, compared at 100% clock speed on a single machine.
“Alternate: Heavy Flexible Frame” in a Manufacturer makes the most per machine, 3.75 items/min. Per unit of Modular Frame, though, “Alternate: Heavy Encased Frame” is the one ahead instead: 0.375 against 0.200, a gap of 1.88×.
Rates per minute are given at 100% clock speed. Solids are shown in items/min, fluids and gases in m³/min. Output per MW compares the step on its own; it excludes the power used upstream and by extraction.