The AMD RX 6800 is the objective winner of this comparison, securing victory in eight out of thirteen measured specifications. Its most significant technical advantage is its FP16 performance, which is 424% better than that of the alternative. While the AMD RX 580 remains competitive in specific areas, it falls behind in the majority of categories, failing to match the substantial computational throughput offered by the newer architecture.

Users prioritizing raw computational power and modern performance capabilities should choose the AMD RX 6800 for its superior FP16 performance. Conversely, the AMD RX 580 is the logical choice for budget-conscious buyers, as it maintains a 66% advantage in MSRP. Selecting between these two components depends entirely on whether the user values the significant performance gains of the newer model or the lower cost associated with the older hardware.