The Seasonic VERTEX GX-1000 is the objective winner of this comparison, securing victory in four out of seven evaluated specifications. Its most significant advantage over the competition is the inclusion of the 12VHPWR connector, which represents a 100% improvement in connectivity capability. While the Corsair RM850x remains a viable alternative, it only leads in a single category, specifically offering a 26% better MSRP compared to the higher-capacity unit.

Users prioritizing modern hardware compatibility should select the Seasonic VERTEX GX-1000 to utilize its dedicated 12VHPWR connector for the latest graphics cards. Conversely, the Corsair RM850x is the logical choice for budget-conscious builders who do not require the additional power headroom or specific connector support provided by the alternative. Choosing between these two power supplies depends entirely on whether your build requires the latest connection standards or a more cost-effective power solution.