The Seasonic Prime TX-1600 ATX 3.1 is the objective winner of this comparison, securing five spec victories against the single win held by the Corsair HX1500i. The most significant technical advantage for the Seasonic unit is its SATA connector count, which provides 125% more connectivity than the Corsair alternative. While the Corsair HX1500i remains competitive in specific areas, it ultimately falls behind the Seasonic Prime TX-1600 ATX 3.1 across the majority of measured hardware specifications.

Users who prioritize maximum peripheral connectivity for storage-heavy builds should choose the Seasonic Prime TX-1600 ATX 3.1 to utilize its superior SATA capacity. Conversely, the Corsair HX1500i is the better option for budget-conscious builders, as it offers a 30% advantage in MSRP. Selecting between these two power supplies depends entirely on whether your primary requirement is the expanded connector utility of the Seasonic model or the cost efficiency provided by the Corsair unit.