The Corsair SF850 is the objective winner of this comparison, securing more individual specification victories than its counterpart. While the Corsair HX1500i offers a significant advantage in total power capacity, providing 76% more wattage, the Corsair SF850 holds the most impactful edge in this matchup. By offering a 43% better MSRP, the latter provides a more cost-effective solution for users who do not require the extreme power output of the former.

Choose the Corsair HX1500i if your system configuration demands the highest possible wattage to support heavy-duty hardware components. Conversely, the Corsair SF850 is the superior choice for builders who prioritize a more accessible price point and do not need the excessive power headroom provided by the larger unit. Selecting between these two power supplies depends entirely on whether your specific build requires the massive capacity of the HX1500i or the economic efficiency of the SF850.