Overclocked through Radeon Software. Works best on Phoenix Miner
1. Turn on the Compute mode for the card
2. Set memory timing level 1
3. Set core and memory frequencies.
4. Restart mining
On RX 580, there is no need to lower the Power limit, as this leads to a significant drop in the hash rate. Instead, you need to reduce the core frequency - this will reduce power consumption to about 102W.