The Intel Arc B580 and the NVIDIA RTX 3090 are tied in this objective comparison, with each component winning seven out of fourteen total specifications. The most impactful advantage for the Intel Arc B580 is its AV1 Encoding capability, which is 100% better than the alternative. Conversely, the NVIDIA RTX 3090 holds a significant lead in raw processing power, featuring a 310% advantage in shader units compared to the Intel offering.

Users who prioritize advanced media workflows and modern video encoding should choose the Intel Arc B580 for its superior AV1 performance. Those who require maximum computational throughput for intensive rendering or parallel processing tasks should select the NVIDIA RTX 3090, as its vastly higher shader unit count provides a clear advantage for those specific workloads. Your final decision depends entirely on whether your primary focus is on efficient media encoding or raw shader-based processing power.