The NVIDIA GeForce RTX 4090D is the objective winner of this comparison, securing victory in twelve out of fourteen measured specifications. Its most significant technical advantage is its FP32 performance, which is 630% better than that of the NVIDIA RTX 2080. While the older card maintains a lead in MSRP, the massive disparity in raw computational power establishes the newer model as the superior hardware choice for demanding tasks.

Users prioritizing maximum computational throughput and high-end performance should select the NVIDIA GeForce RTX 4090D to leverage its substantial FP32 advantage. Conversely, the NVIDIA RTX 2080 remains the appropriate choice for budget-conscious buyers who prioritize a lower MSRP over the superior processing capabilities of the newer generation. Your decision should depend on whether your primary requirement is raw power or a more accessible initial cost.