The be quiet! Pure Power 13 M 850W and the Corsair RM850x are tied in this objective comparison, as each unit leads in three out of nine measured specifications. The most impactful advantage for the be quiet! Pure Power 13 M 850W is its inclusion of a 12VHPWR connector, which represents a 100% improvement over the alternative. Conversely, the Corsair RM850x holds a significant lead in connectivity, offering 67% more SATA connectors than its competitor.

Users prioritizing modern hardware compatibility should select the be quiet! Pure Power 13 M 850W for its native 12VHPWR support. This makes it the superior choice for systems utilizing the latest graphics cards requiring this specific interface. Alternatively, those building storage-heavy systems or workstations that rely on multiple peripheral drives should choose the Corsair RM850x, as its higher count of SATA connectors provides the necessary flexibility for extensive drive configurations.