The Corsair HX1500i is the objective winner of this comparison, securing more individual specification victories than its counterpart. While the Corsair AX1600i maintains a significant lead in power efficiency, outperforming the alternative by 20 percent, the Corsair HX1500i provides a more modern feature set. The most impactful advantage for the Corsair HX1500i is its inclusion of the 12VHPWR connector, which represents a 100 percent improvement in native compatibility for this specific interface compared to the Corsair AX1600i.

Users prioritizing maximum power efficiency should select the Corsair AX1600i, as it offers a 20 percent advantage in that category. Conversely, those who require native support for the 12VHPWR connector should choose the Corsair HX1500i. By opting for the Corsair HX1500i, builders gain the benefit of a superior interface connection, while the Corsair AX1600i remains the optimal choice for those specifically seeking the highest level of efficiency available between these two units.