The Gigabyte X870E AORUS MASTER is the objective winner of this comparison, securing a lead in eight out of fourteen evaluated specifications. Its most impactful advantage over the Gigabyte B850 GAMING X is the inclusion of USB Type-C connectivity, which offers a 100% improvement in that category. While the Gigabyte B850 GAMING X holds its own with a 100% advantage in PCIe x1 slots, it ultimately falls behind in the majority of measured technical metrics.

Users who prioritize modern peripheral connectivity and high-end feature sets should select the Gigabyte X870E AORUS MASTER for their build. Conversely, the Gigabyte B850 GAMING X is the better choice for those who specifically require the increased capacity of additional PCIe x1 slots for expansion cards. Your final decision should depend on whether your workflow relies more heavily on advanced USB interface capabilities or the specific expansion layout provided by the smaller board.