The NVIDIA RTX 3070 Ti is the objective winner of this comparison, securing victory in eight out of thirteen measured specifications. Its most significant advantage over the competition is its shader unit count, which is 336% higher. While the NVIDIA GTX 1660 holds its own in four categories, including a notable 68% lead in memory clock speed, the substantial architectural superiority of the newer card makes it the clear leader in raw technical capability.

Users prioritizing raw processing power and modern hardware density should choose the NVIDIA RTX 3070 Ti for its massive advantage in shader units. Conversely, the NVIDIA GTX 1660 remains a viable option for specific use cases that rely heavily on the higher memory clock speed provided by that card. Select the former for high-intensity tasks requiring maximum shader throughput, or the latter if your specific workload benefits more from the memory clock advantage.