I own now 2x Sapphire 5700XT.

I have used Adrenaline 1.9.2.2 and classic setting posted on this topic; -tt 62  -cclock 1300 -cvddc 800 -mclock 900 -hstats 2 it gives 52,x MH but it fails in minutes.

I have tried lower or bigger -cvvdc between 750 and 900mV, even lower/higher -tt, it fails randomly showing 0.00MH.

I tried also to keep memory stock (875MHz), it fails randomly, same problem and miner stays locked, mouse too, just hard reset works.

When I have removed -hstats 2 command, keeping just  -tt 62  -cclock 1300 -cvddc 800 -mclock 900, it worked fine 12 hours but I just tried last sollution: I have deleted all commands -tt 62  -cclock 1300 -cvddc 800 -mclock 900 -hstats 2 from ,bat file and I have used just Msi Afterburner 4.6.2 beta 2           https://www.guru3d.com/files-details/msi-afterburner-beta-download.html        wich full controls power limit, voltage and frequency, now I left voltage unattended (1187mV), GPU frequency stock, memory increased at 900MHz and power limit down to -43 or even -44%.

Works flawless.

It looks as the much commands gived to the miner (tt 62  -cclock 1300 -cvddc 800 -mclock 900 -hstats 2), especially -hstats 2,  gives driver error (atimtag.dll) and locks the miner...

So, I keept settings as in picture attached and .bat file as simple, without extra commands ex:  PhoenixMiner.exe -pool ssl://eu1.ethermine.org:5555 -pool2 ssl://us1.ethermine.org:5555 -wal your wallet adress.rig name, and is rock solid.

https://i.postimg.cc/RhtKXjtg/Best-settings.jpg