The NVIDIA GTX 1660 is the objective winner of this comparison, securing victories in nine out of twelve measured specifications. Its most significant advantage is its FP32 performance, which is 346% higher than that of the alternative. While the NVIDIA GeForce GT 1030 maintains a lead in power efficiency with a 75% better TDP, the substantial gap in raw computational capability makes the former the superior choice for demanding graphical tasks.

Users prioritizing high-performance computing should select the NVIDIA GTX 1660 to leverage its vastly superior FP32 performance. Conversely, the NVIDIA GeForce GT 1030 is the appropriate choice for builds where power efficiency is the primary constraint, as it offers a significantly lower TDP. Choosing between these two components depends entirely on whether your specific system requirements favor maximum processing power or the reduced power consumption profile offered by the lower-spec option.