The ASUS ROG MAXIMUS Z890 EXTREME is the objective winner of this comparison, securing a lead in seven out of eleven evaluated specifications. Its most significant technical advantage is its LAN capability, which outperforms the Gigabyte A620M DS3H by 900 percent. While the Gigabyte A620M DS3H does offer a 100 percent advantage in the number of PCIe x1 slots, the ASUS ROG MAXIMUS Z890 EXTREME maintains a superior overall configuration across the majority of the measured categories.

Users prioritizing high-speed networking and a more robust feature set should select the ASUS ROG MAXIMUS Z890 EXTREME for their build. Conversely, the Gigabyte A620M DS3H is the appropriate choice for those who specifically require additional PCIe x1 slots for expansion cards. Your decision should depend on whether your primary requirement is the superior LAN performance provided by the ASUS board or the specific slot configuration offered by the Gigabyte alternative.