The AMD RX 9060 XT 8 GB is the objective winner of this comparison, securing victories in ten out of thirteen measured categories. Its most significant technical advantage is its FP32 performance, which is 410% higher than that of the NVIDIA GTX 1660. This substantial lead in raw computational throughput makes the AMD RX 9060 XT 8 GB the superior choice for users prioritizing modern processing power across the majority of evaluated hardware specifications.

Users should select the AMD RX 9060 XT 8 GB if they require the highest level of FP32 performance for their specific computing tasks. Conversely, the NVIDIA GTX 1660 remains a viable alternative for those whose workflows rely specifically on a wider memory bus, where it maintains a 50% advantage over the competitor. Choosing between these two components depends entirely on whether your primary requirement is raw computational speed or the specific memory bus width provided by the NVIDIA option.