The Intel Arc B580 is the objective winner of this comparison, securing victories in ten out of thirteen measured categories. Its most significant advantage over the NVIDIA GTX 1660 SUPER is its FP32 performance, which is 172% better. This substantial lead in raw computational capability establishes the Intel Arc B580 as the superior choice for users prioritizing high-end processing power and modern hardware specifications in their system configuration.

Users who require maximum computational throughput should select the Intel Arc B580 for its dominant performance advantage. Conversely, the NVIDIA GTX 1660 SUPER remains a viable option for those who prioritize power efficiency, as it maintains a 34% advantage in TDP. Choosing between these two components depends on whether your primary build requirement is the raw processing power offered by the Intel card or the lower power consumption profile provided by the NVIDIA alternative.