The MSI MEG Z890 ACE is the objective winner of this comparison, securing more victories across the evaluated technical specifications. Its most significant advantage over the Gigabyte B850 GAMING X is the inclusion of USB Type-C connectivity, which offers a 200% improvement in that specific category. While both boards share several identical features, the MSI MEG Z890 ACE provides a more robust set of technical specifications overall, establishing it as the superior option based on the data provided.

Users who prioritize high-speed peripheral connectivity should choose the MSI MEG Z890 ACE for its substantial USB Type-C advantage. Conversely, the Gigabyte B850 GAMING X is the better selection for builders who require a higher density of PCIe x1 slots, where it maintains a 100% advantage over the alternative. Selecting between these two motherboards depends entirely on whether your specific build requirements favor modern external data interfaces or additional internal expansion card capacity.