The ASUS ROG STRIX X670E-E GAMING WIFI is the objective winner, securing victories in eight of the thirteen comparable fields. Its most significant advantage is the inclusion of PCIe x16 slots, which offer a 200% improvement over the alternative. While the Gigabyte B660M DS3H DDR4 holds its own in specific areas, the ASUS motherboard provides a more robust foundation for users requiring superior expansion capabilities for high-performance hardware.

Choose the ASUS ROG STRIX X670E-E GAMING WIFI if your build requires extensive PCIe x16 connectivity for multiple high-bandwidth devices. Conversely, the Gigabyte B660M DS3H DDR4 is the better selection for users who prioritize a higher count of PCIe x1 slots, where it maintains a 100% advantage. Selecting between these two boards depends entirely on whether your specific expansion needs favor the primary x16 lanes or the secondary x1 slots.