The ASRock H670 Steel Legend and the Gigabyte B850 GAMING X are tied in this objective comparison, as both motherboards secure an equal number of specification wins. The most impactful advantage for the ASRock H670 Steel Legend is its PCIe x1 slot configuration, which offers a 200% improvement over the competition. Conversely, the Gigabyte B850 GAMING X provides a significant lead in memory capacity, boasting a 100% advantage in maximum supported memory over the ASRock alternative.

Users who prioritize expansion capabilities for additional peripherals should select the ASRock H670 Steel Legend for its superior PCIe x1 slot count. Alternatively, those who require extensive system memory for demanding workloads or future-proofing should choose the Gigabyte B850 GAMING X. Because both boards offer identical performance across the majority of measured specifications, the final decision rests entirely on whether your specific build requires more expansion slots or higher total memory capacity.