The Gigabyte Z890 AORUS MASTER is the objective winner of this comparison, securing more individual specification victories than the Gigabyte X870E AORUS MASTER. While both motherboards share identical ratings across the majority of their technical fields, the Z890 AORUS MASTER holds the most significant advantage in this matchup. It offers a 100% improvement in PCIe x1 slot availability, providing double the expansion capacity for smaller peripheral cards compared to its counterpart.

Users who prioritize maximum connectivity for secondary expansion cards should choose the Gigabyte Z890 AORUS MASTER for its superior PCIe x1 slot count. Conversely, the Gigabyte X870E AORUS MASTER remains the better selection for those who require more primary expansion capability, as it provides a 50% advantage in PCIe x16 slots. Your final decision should depend entirely on whether your specific build configuration relies more heavily on primary graphics or secondary peripheral expansion.