Hi Doktor,

Accoding to you recomendation I changed drivers to Adr.18.6.1(prev. was blockchain)
and faced with hash rate double decreased.
Iw was ~1900h/s on old drivers, but now it ~830h/s for rx570-4 on CN fast.
Compute mode enabled(SRBMiner-CN.exe --setcomputemode).

Please, help. Ireaaly dont want to return to blockchain drv.