The Seasonic VERTEX GX-1200 is the objective winner of this comparison, securing more victories across the evaluated technical specifications. Its most significant advantage over the EVGA SuperNOVA 850 G6 is its SATA connector count, which provides a 100% improvement in connectivity capacity. While the EVGA SuperNOVA 850 G6 maintains a 50% advantage in PCIe connectors, the Seasonic VERTEX GX-1200 ultimately leads in the majority of the measured categories, establishing it as the more versatile power supply option.

Users requiring extensive storage expansion or peripheral support should choose the Seasonic VERTEX GX-1200 to leverage its superior SATA connectivity. Conversely, the EVGA SuperNOVA 850 G6 is the better selection for builders prioritizing PCIe connectivity for high-end graphics configurations. Selecting between these two units depends entirely on whether your specific system build demands a higher volume of SATA-based storage devices or a greater number of dedicated PCIe power connections for your hardware.