How do I overclock my GPU RX 580 for mining?

Yes. The newest cards have raytracing cores, but you can also do raytracing on older cards (as old as the rx 580) below is a raytracing benchmark on neon noir from cryengine.

The RX 580 NVIDIA equivalent is the GTX 1060 , which is the generation preceding the GTX 1070. The GTX 1070 AMD equivalent is the Radeon RX Vega 56, which is significantly newer than the Radeon RX 580.

It is understandable, however, because the RX 580 delivers great mining performance at a reasonable cost of entry while keeping power consumption under check as well.