I have 2 x PowerColor Red Devil RX-580 Golden Sample 8GB cards mining Electroneum with the following speeds with v11.0
XMR - Total Speed: 1721 H/s, Total Shares: 442, Rejected: 0, Time: 17:40
XMR: GPU0 858 H/s, GPU1 863 H/s
If I'm not mistaken, I think I was getting around 780/790 H/s per card prior to the update.
BIOS moded with the following reported by rocm-smi:
==================== ROCm System Management Interface ====================
================================================================================
GPU DID Temp AvgPwr SCLK MCLK Fan Perf OverDrive ECC
1 67df 54.0c 76.111W 1265Mhz 2250Mhz 40.0% auto 0% N/A
0 67df 62.0c 77.182W 1265Mhz 2250Mhz 40.0% auto 0% N/A
================================================================================
==================== End of ROCm SMI Log ====================
Wish I could hit the 900+ H/s mark, but I'm not sure what else I could do to improve the speeds.