I am running 6 RX580s, newest Radeon drivers, Claymore 11.0. When I use the memory and core voltage and clock parameters, they have no effect. This is my command line:
EthDcrMiner64.exe -epool eu1.ethermine.org:4444 -ewal ... -epsw x -dpool stratum+tcp://xvg.eu1.unimining.net:5770 -dwal ... -dpsw c=XVG -allpools 1 -esm 1 -mode 0 -dcoin blake2s -asm 1 -dcri 49 -platform 1 -ftime 0 -tt 65 -ttli 75 -tstop 80 -tstart 50 -mclock 2065,2065,2030,2065,2065,2065 -mvddc 800 -cvddc 850 -mport -10047 -r 1 -dbg 0

Any advice on this?