Did you try -asm 1 ? or just -rxboost 30 -strap 1@2000 ? or set your core clock to 1200? and use amd driver 19.4.3 ... that is what claymore used for testing
Got it to work with amd driver 19.4.3!
Unfortunately, on 7 RXR80, the 3 first (Nitro +) are runnin g@ 30MH/S, DAG file created in 8000ms, and the rest of the cards are creating the DAG in 12000ms and a final hashrate of 20MH/S.
Compute mode is activated, one by one on amd drivers, didn't work(after reboot),
DDU, reinstall driver, using -Y 1 on claymore, same results.
It did one times work, but i got tons of error at first (millions) and then it didn't change.
I restarted the PC, then boom, same as before. I really don't understand that and i've never found somebody with the same issue.
Previously i was running bios mod but it seems easier at first but now i waste more time trying to make it work than flashing the bios