The NVIDIA GeForce RTX 5090D is the objective winner of this comparison, securing victory in ten out of twelve measured categories. Its most significant technical advantage is its FP32 performance, which is 1826% higher than that of the NVIDIA GTX 1660 Ti. This massive disparity in raw computational capability establishes the former as the superior component across the vast majority of the evaluated hardware specifications.

Users prioritizing maximum computational power should select the NVIDIA GeForce RTX 5090D to leverage its substantial lead in FP32 performance. Conversely, the NVIDIA GTX 1660 Ti is the appropriate choice for budget-conscious buyers, as it maintains an 88% advantage in MSRP. Choosing between these two components depends entirely on whether your primary requirement is the highest possible processing capability or the most favorable initial purchase cost.