The ASRock B760M PG Lightning/D4 is the objective winner of this comparison, having secured two spec victories compared to none for the Gigabyte B660M DS3H DDR4. The most impactful advantage offered by the ASRock B760M PG Lightning/D4 is its superior maximum memory speed, which provides an 11% improvement over the alternative. This performance edge makes it the more capable option for users prioritizing memory throughput in their system configuration.

Users who require the highest possible memory speed should choose the ASRock B760M PG Lightning/D4 for their build. Conversely, the Gigabyte B660M DS3H DDR4 remains a viable alternative only if specific requirements align with the one tied specification shared between both motherboards. Given that the ASRock B760M PG Lightning/D4 leads in the majority of comparable fields, it is the more technically robust choice for most standard desktop applications.