The AMD RX 480 and the NVIDIA GTX 1660 reach a stalemate in this objective comparison, as both components secure an equal number of specification victories. While the overall performance profile remains balanced, the two cards diverge significantly in their technical strengths. The AMD RX 480 holds a substantial lead in raw hardware density with 64% more shader units, whereas the NVIDIA GTX 1660 demonstrates a clear advantage in computational efficiency, boasting 72% higher FP16 performance.

Users prioritizing high shader unit counts for specific parallel processing tasks should select the AMD RX 480. Conversely, those who require superior FP16 performance for specialized workloads should opt for the NVIDIA GTX 1660. Because neither card emerges as a definitive winner across the full spectrum of specifications, the choice depends entirely on whether your specific application benefits more from the increased shader count or the enhanced FP16 capabilities provided by these respective architectures.