Sure is a nicehash problem, I just wrote that to see if is anyone else in this situation.
It have observed is doing this issue when software selects from algorithms "Claymore miner" (all options is dual mining for Claymore) as mining algorithm.
I will uncheck all other algorithms (as they are not profitable) and I will keep checked just Phoenix miner for Radeon VII card, to see what's happen.
I will reply here, results.
EDIT: using just Phoenix miner selected as mining algorithm, all works perfect, no earning drops to 0.
So, it looks to be claymore dual miner issue or bad nicehash implementation of claymore miner.
All claymore algorithms implemented are dual mining, claymore single isn't...
Finally, I just checked only
Phoenix miner, all
others unchecked for Radeon VII card, everything is flawless!
Moreover, with some fine-tuning you can get more hash rate and much less power consumption rather than using nicehash and letting it do the optimizations.
Radeon VII can achieve around 100MH/s in ETH.
I have deja adjusted fine tunning for that card, (for all cards practically).
When Radeon VII is colder than 69 celcius degrees is achieving a little above 95MH, I don't want to stress it more that is enough, if I try more than 1870 MHz GPU with less than 1050mV and more than 1100 memory (1870GPU/1050mV/1100MMz memory are actual best settings), it start to give bad shares.
I prefear a little less MH with less stress and better/best stability, instead to run alot of restarts and locked miner.
No one is getting reacher with 3-5 MH in plus at one card.
Maybe for 20-50 Radeon VII cards it worths to win couple extra shares in plus, but just for one card, sure no...
))))) Especially in ´´ No one is getting reacher with 3-5 MH in plus at one card. ´´´. you mean , doesnt matter on my 324 GPU 580 / 590 and a few Vega 56 ?! Get out and look for a job or delivery pizza in your town hommie
i used claymore and phoenix . with CM i have 3 mhs more at the same wattage , with phoenix less dev fee