The Gigabyte Z790 AORUS ELITE AX is the objective winner of this comparison, securing a lead in seven out of eleven evaluated specifications. Its most significant advantage over the Gigabyte A620M DS3H is the inclusion of M.2 slots, which offer a 300% improvement in capacity for high-speed storage expansion. While the Gigabyte A620M DS3H holds a 100% advantage in PCIe x1 slots, it falls behind in the majority of the measured technical categories.

Users requiring extensive high-speed storage configurations should select the Gigabyte Z790 AORUS ELITE AX to leverage its superior M.2 slot count. Conversely, the Gigabyte A620M DS3H is the appropriate choice for builders who prioritize a higher number of PCIe x1 slots for their specific peripheral requirements. Each motherboard serves distinct connectivity needs, so the decision should depend entirely on whether your build relies more heavily on M.2 storage or PCIe x1 expansion cards.