The AMD RX 6400 and the NVIDIA GTX 1660 SUPER represent a technical tie, as both components secured an equal number of wins across the measured specifications. The most significant advantage for the AMD RX 6400 is its power efficiency, which is 58% better than the alternative. Conversely, the NVIDIA GTX 1660 SUPER holds a substantial lead in memory architecture, offering a memory bus that is 200% better than the competition.

Users prioritizing low power consumption should select the AMD RX 6400 for its superior TDP efficiency. This makes it a suitable choice for builds where thermal management or power draw is the primary concern. Alternatively, those who require a wider memory bus for data throughput should choose the NVIDIA GTX 1660 SUPER. This component is the better option for tasks that benefit from the increased bandwidth provided by its significantly larger memory interface.