The Gigabyte Z890 AORUS MASTER is the objective winner of this comparison, securing victory in seven of the thirteen evaluated categories. Its most significant technical advantage over the ASRock H670 Steel Legend is its maximum memory capacity, which is 100% higher. While the ASRock H670 Steel Legend holds a 200% advantage in the number of PCIe x1 slots, the superior memory ceiling makes the Gigabyte Z890 AORUS MASTER the more capable option across the majority of measured specifications.

Users who prioritize high-capacity memory configurations for demanding workloads should choose the Gigabyte Z890 AORUS MASTER to take advantage of its doubled memory limit. Conversely, the ASRock H670 Steel Legend is the better choice for builders who specifically require a higher quantity of PCIe x1 slots for peripheral expansion. Selecting between these two motherboards depends entirely on whether your build necessitates greater memory headroom or increased connectivity for specialized expansion cards.