The Gigabyte Z890 AORUS MASTER is the objective winner, securing victory in ten out of thirteen comparable specifications. Its most significant advantage over the alternative is its maximum memory capacity, which is 300% higher than that of the competing board. While the Gigabyte B660M DS3H DDR4 holds a single spec win, the superior technical ceiling offered by the Z890 AORUS MASTER makes it the clear choice for users prioritizing high-end hardware support and expanded system memory.

Choose the Gigabyte Z890 AORUS MASTER if your build requires extensive memory overhead and advanced features, as it provides a substantial 300% increase in maximum memory capacity. Conversely, select the Gigabyte B660M DS3H DDR4 if your primary goal is cost efficiency, as it offers an 82% advantage in MSRP. This budget-focused option is better suited for users who do not require the high-capacity memory support found in the more robust alternative.