The NVIDIA GTX 1660 is the objective winner of this comparison, securing victory in nine out of twelve measured specifications. Its most significant advantage over the AMD Radeon RX 550 is its FP32 performance, which is 315% better. While the AMD Radeon RX 550 holds a 64% advantage in MSRP, the NVIDIA GTX 1660 dominates the technical landscape by outperforming its competitor across the vast majority of the evaluated hardware categories.

Users prioritizing raw computational power should choose the NVIDIA GTX 1660 to leverage its substantial lead in FP32 performance. Conversely, the AMD Radeon RX 550 is the appropriate selection for budget-conscious buyers who prioritize a lower MSRP above all other technical specifications. Selecting between these two components depends entirely on whether your primary requirement is the superior processing capability offered by the NVIDIA card or the cost efficiency provided by the AMD alternative.