The Corsair RM850x (2024) is the objective winner of this comparison, securing more individual specification victories than its competitor. While both power supplies share several identical technical attributes, the Corsair RM850x (2024) holds a significant advantage in affordability, offering a 35% better MSRP. This cost-efficiency makes it the superior choice for users prioritizing value, whereas the be quiet! Pure Power 13 M 1200W distinguishes itself primarily through its raw power capacity, providing 41% more wattage.

Choose the Corsair RM850x (2024) if you are building a standard high-performance system and want to maximize your budget without sacrificing core specifications. Conversely, select the be quiet! Pure Power 13 M 1200W if your specific hardware configuration requires the substantial increase in wattage capacity it provides. By weighing the importance of total power output against the 35% price advantage of the Corsair unit, you can determine which component best aligns with your build requirements.