The AMD RX 6400 and the NVIDIA GTX 1660 Ti result in an objective tie across the provided specifications. While both components share an equal number of category wins, they offer distinct technical advantages. The AMD RX 6400 provides a significant benefit in power efficiency, boasting a TDP that is 56% better than its competitor. Conversely, the NVIDIA GTX 1660 Ti excels in data throughput, featuring a memory bus that is 200% better than the alternative.

Users prioritizing energy efficiency and lower power consumption should select the AMD RX 6400 for their build. This component is ideal for systems where thermal management or power draw is the primary concern. Alternatively, those who require superior memory bandwidth for data-heavy tasks should choose the NVIDIA GTX 1660 Ti. This option is better suited for users who value the increased capacity of the memory bus over the power-saving benefits offered by the other card.