The NVIDIA RTX 3090 is the objective winner of this comparison, securing more total spec victories than the NVIDIA GTX 1660 Ti. The most impactful advantage for the RTX 3090 is its shader unit count, which is 583% higher than that of the alternative. While the GTX 1660 Ti maintains a significant lead in MSRP, which is 81% better, the superior hardware density of the RTX 3090 establishes it as the more capable component across the majority of measured specifications.

Users prioritizing the most advanced hardware specifications should select the NVIDIA RTX 3090 to benefit from its massive advantage in shader units. Conversely, the NVIDIA GTX 1660 Ti is the logical choice for buyers who place the highest priority on a lower MSRP. By weighing the 81% cost advantage of the GTX 1660 Ti against the 583% shader unit advantage of the RTX 3090, users can align their purchase with either budget constraints or hardware performance requirements.