I tried to switch from claymore to phoenixminer but,

claymore: Rx 570 8gb 31.643 Mh / s
Phoenixminer: 30.254 Mh / s


EthDcrMiner64.exe -epool eth-eu1.nanopool.org:9999 -ewal xxx -epsw x -asm 2 -rxboost 1 -y 1


PhoenixMiner.exe -pool eth-eu1.nanopool.org:9999 -wal xxxxx  -pass x -acm