The NVIDIA RTX 5080 is the objective winner of this comparison, securing victories in nine of the fourteen evaluated categories. Its most significant advantage over the AMD RX 6900 XT is its FP32 performance, which is 144% higher. While the AMD RX 6900 XT maintains a lead in power efficiency with a 17% better TDP, the substantial gap in raw computational throughput positions the NVIDIA RTX 5080 as the superior component across the majority of measured technical specifications.

Users prioritizing maximum computational power and performance should choose the NVIDIA RTX 5080, as it offers a massive advantage in FP32 capabilities. Conversely, the AMD RX 6900 XT is the better selection for those who specifically value power efficiency, as it remains the more favorable option regarding TDP. Your final decision should depend on whether your primary requirement is the raw processing strength of the NVIDIA card or the power-conscious design of the AMD alternative.