The Gigabyte Z790 AORUS ELITE AX is the objective winner of this comparison, securing victories in two out of three evaluated specifications. Its most significant advantage over the alternative is its maximum memory capacity, which is 100% better. This substantial increase in supported memory overhead provides a clear technical lead for the primary model, establishing it as the superior choice for users prioritizing high-capacity system configurations and future-proof memory expansion.

Users who require maximum memory support should select the Gigabyte Z790 AORUS ELITE AX to leverage its superior capacity. Conversely, the Gigabyte Z790 AORUS ELITE AX DDR4 is the better option for budget-conscious builders, as it offers an 18% advantage in MSRP. Choosing between these two motherboards depends entirely on whether your priority is the expanded memory ceiling of the primary model or the cost efficiency provided by the DDR4 variant.