The AMD RX 580 and the NVIDIA GTX 1660 Ti are tied in this objective comparison, with each card winning six out of thirteen specifications. The most impactful advantage for the AMD RX 580 is its shader unit count, which is 50% higher than that of its competitor. Conversely, the NVIDIA GTX 1660 Ti holds a significant lead in computational efficiency, boasting FP16 performance that is 76% higher than the alternative.

Users prioritizing raw shader capacity should select the AMD RX 580 for their build. Those who require superior FP16 performance for their specific computing tasks should opt for the NVIDIA GTX 1660 Ti instead. Because both components share an equal number of specification wins, the final choice depends entirely on whether your workload benefits more from the higher shader count or the increased FP16 capabilities provided by these respective graphics cards.