The AMD RX 6650 XT is the objective winner of this comparison, securing nine out of thirteen total specification categories. Its most significant advantage over the NVIDIA GTX 1660 is its FP32 performance, which is 115% higher. This substantial lead in raw computational capability establishes the AMD RX 6650 XT as the superior option for users prioritizing modern processing power and overall hardware efficiency across the majority of the measured technical fields.

Users who require maximum FP32 performance should choose the AMD RX 6650 XT for their build. Conversely, the NVIDIA GTX 1660 remains a viable alternative for specific use cases that prioritize a wider memory bus, where it maintains a 50% advantage over the AMD RX 6650 XT. Selecting between these two components depends on whether your workload benefits more from the superior computational throughput of the former or the specific memory bus architecture of the latter.