The Intel Arc A580 is the objective winner of this comparison, securing victories in twelve out of thirteen measured categories. Its most significant technical advantage is its FP16 performance, which is 145% better than that of the NVIDIA GTX 1660 SUPER. By outperforming the competition across the vast majority of specifications, the Intel Arc A580 establishes itself as the superior hardware choice for users prioritizing raw computational capability and modern architectural features over legacy power efficiency.

Users who require the highest possible performance should choose the Intel Arc A580 for its substantial lead in processing power. Conversely, the NVIDIA GTX 1660 SUPER remains the appropriate selection for those who prioritize power efficiency, as it maintains a 29% advantage in TDP. Selecting between these two components depends entirely on whether your primary goal is maximizing computational output or minimizing power consumption within your system configuration.