Thanks for the quick response!

In the search engine found WildRig Multi version 0.15.3.8
The description hashrate for RX 570 - 6.3 Mh / s video cards (overclocked)
These are the same as mine and not 8-10Mh / s offered by you.
Therefore, this option may not solve my problem.

I set up a farm with AMD RX 570 graphics cards to mine RVN and use
miner sgminer-x16r-v0.4.0
The miner works stably, but I am not satisfied with the low hashrate of only 6 Mh / s per video card.
The NVIDIA card works nearby and gives 12-15 Mh / s
Who can help increase hashrate on AMD cards?
New drivers installed, video cards flashed, overclocked.