The Corsair AX1600i is the objective winner of this comparison, securing a lead in four out of nine evaluated specifications. Its most impactful advantage is the inclusion of SATA connectors, which offer a 100% increase in capacity compared to the alternative. This superior connectivity makes it the more robust choice for systems requiring extensive peripheral support, ensuring that users have double the available ports for storage drives and other hardware components.

Choose the Corsair AX1600i if your build demands maximum SATA connectivity for complex storage arrays or multiple peripheral devices. Conversely, select the Corsair HX1200i if your primary requirement is the 12VHPWR connector, which provides a 100% advantage in that specific interface category. This makes the latter unit the more suitable option for modern graphics cards that rely on this specific power standard, despite the overall spec lead held by the former.