If you have Sapphire Pulse RX580 8Gb Hynix with it`s own 1750 straps at 1100 Mhz Core and 2150 Memory it will hash with dual mining Ethereum 27.3Mh/s and 500Mh/s Sia at -dcri 17 if you use this strap 777000000000000022CC1C00106A6D4DD0571016B90D060C006AE70014051420FA8900A00300000 01B11333DC0303A17  it will hash at 29.5 Mh/s Ethereum + 500 Mh/s Sia .