The AMD RX 5600 XT and the NVIDIA GTX 1660 result in an objective tie across the evaluated technical specifications. While both components share an equal number of winning categories, the AMD RX 5600 XT holds a significant lead in raw processing potential, offering a 64% advantage in shader units. This hardware disparity represents the most impactful difference between the two options, as the remaining metrics are balanced by the NVIDIA GTX 1660 holding a 35% advantage in base clock speed.

Users prioritizing high-density parallel processing should select the AMD RX 5600 XT to leverage its superior shader unit count. Conversely, those who value higher base clock frequencies for their specific workload requirements should opt for the NVIDIA GTX 1660. Because neither card dominates the overall specification set, the final decision depends entirely on whether your primary computing tasks benefit more from the increased shader capacity of the former or the higher base clock of the latter.