The Intel Arc B580 is the objective winner of this comparison, securing victories in ten out of fourteen measured categories. Its most significant advantage over the NVIDIA RTX 3070 is its AV1 Encoding capability, which performs 100% better. This technical lead across the majority of specifications positions the Intel Arc B580 as the more modern and versatile option for users prioritizing current encoding standards and broad feature support in their hardware configuration.

Users who prioritize advanced media workflows should choose the Intel Arc B580 for its superior encoding performance. Conversely, those who require maximum raw processing power for graphics-intensive tasks should select the NVIDIA RTX 3070, which maintains a 130% advantage in shader units. By weighing the importance of modern encoding features against the raw computational capacity of the shader architecture, buyers can align their choice with their specific professional or creative requirements.