The Corsair HX1500i and the Corsair RM850x (2024) reach an objective tie across the evaluated technical specifications. While both units share equal standing in the majority of categories, they diverge significantly in their primary strengths. The Corsair HX1500i provides a substantial advantage in total power capacity, offering 76% more wattage than its counterpart. Conversely, the Corsair RM850x (2024) holds a distinct lead in affordability, featuring an MSRP that is 57% better than the higher-capacity model.

Users requiring maximum power output for extreme hardware configurations should select the Corsair HX1500i to ensure sufficient wattage for demanding systems. Those prioritizing cost-efficiency and building a standard high-performance PC should choose the Corsair RM850x (2024) to take advantage of the significantly lower MSRP. Because both power supplies perform equally across the remaining technical metrics, the final decision rests entirely on whether your specific build necessitates the extra power or the budget-friendly price point.