The be quiet! Straight Power 12 850W is the objective winner of this comparison, securing more wins across the evaluated specifications than the Corsair SF850. The most impactful advantage provided by the be quiet! Straight Power 12 850W is its superior connectivity, as it offers 67% more PCIe connectors than the alternative. This significant lead in hardware interface options establishes it as the more versatile power supply unit for systems requiring multiple high-performance components.

Users should choose the be quiet! Straight Power 12 850W if they require a higher number of PCIe connectors to support complex hardware configurations. Conversely, the Corsair SF850 remains a viable option for builds where the additional connectivity provided by the be quiet! unit is not necessary, as both power supplies are otherwise tied across the majority of their technical specifications. Select the unit that best aligns with your specific requirement for PCIe interface density.