I don't think if my command line was correct, I see some improvement in hashrate but my 4 ramaining cards never get the increase like other card got, Im using same brand of rx 570 4gb..
my command line:PhoenixMiner.exe -pool asia1.ethermine.org:4444 -pool2 asia1.ethermine.org:14444 -wal 0xa465*****E6F45d49ce57E************4.john1010007 -mt 2 -amd -tt 60,55,60,55,55,60,60,60,60,60,60,60 -eres 2 -wdog 1 -proto 2 -powlim -10,-10,-10,-10,-10,-10,-10,-10,-10,-10,-10,-10 -gt 45,28,45,45,45,45,45,45,45,45,45,45 -fanmin 70,70,70,70,70,70,70,70,70,70,70,70 -rmode 1 -gpureset 1
result:main Eth speed: 327.666 MH/s, shares: 111/0/0, time: 0:22
2020.08.19:07:33:49.251: main GPUs: 1: 27.058 MH/s (11) 2: 27.933 MH/s (2) 3: 27.895 MH/s (9) 4: 25.981 MH/s (11) 5: 25.643 MH/s (

6: 27.895 MH/s (7) 7: 25.973 MH/s (14) 8: 27.896 MH/s (10) 9: 27.899 MH/s (12) 10: 27.897 MH/s (13) 11: 27.892 MH/s (7) 12: 27.704 MH/s (7)
You don't nedd to put 12 times the same parameter if it's the same for your 12 cards.
- 30,8 Mh/s 1150/2060 @875mV with 30 in REF parameter in AMDTweakXL. (Samsung Memory)
- 29,9 Mh/s 1110/2000 @875mV with 30 in REF parameter in AMDTweakXL. (Hynix Memory)