well i did get an increase in Mh when i clocked them stupidly, i think i was getting around 11.3Mh on 1460/2225 but it wasnt enough to warrent the extra power, power jumped from 483w for 4x rx 580's on this rig, to 760ish on the same rig. better off just letting them sit on stock core/mem values and undervolt them. atm im getting 10.48Mh per gpu on ethos.