The Intel Arc B580 is the objective winner of this comparison, securing victories in nine out of fourteen measured specifications. Its most significant technical advantage is its FP16 performance, which is 115% better than that of the competing card. This substantial lead in floating-point precision capabilities establishes the Intel Arc B580 as the superior choice based on the provided hardware metrics, outperforming the NVIDIA RTX 3060 12 GB across the majority of the evaluated categories.

Users prioritizing raw computational throughput and high-precision tasks should select the Intel Arc B580 to leverage its significant FP16 performance advantage. Conversely, the NVIDIA RTX 3060 12 GB remains a viable alternative for those specifically requiring a higher count of shader units, where it maintains a 40% advantage over the Intel option. Your final decision should depend on whether your specific workload benefits more from the superior floating-point efficiency of the Intel card or the increased shader capacity of the NVIDIA hardware.