The ASRock X870E Nova WiFi is the objective winner of this comparison, securing victory in ten out of thirteen evaluated specifications. Its most significant technical advantage is its maximum memory capacity, which is 300% higher than that of the alternative. By outperforming the competition across the majority of measured categories, this motherboard establishes itself as the more robust and feature-rich option for users requiring high-end hardware capabilities and extensive system memory support.

Choose the ASRock X870E Nova WiFi if your primary requirement is maximizing system memory for demanding workloads. Conversely, the Gigabyte B660M DS3H DDR4 is the better selection for users who specifically prioritize expansion, as it offers a 100% advantage in available PCIe x1 slots. Selecting between these two components should depend entirely on whether your build necessitates the superior memory ceiling of the former or the specialized slot configuration of the latter.