I'am mining ethereum with 6 RX 580, i'm using Ubuntu 16.04 everything work, exept that I want to overclock my cards but that does not work.
Apparently I have to modify core frequency and memory frequency on that file :
/sys/class/drm/card0/device/pp_mclk_od -> memory Frequency
/sys/class/drm/card0/device/pp_sclk_od -> Core Frequency
I set value to both of them at 10 but when i launch claymore miner the hashrate doesn't increase at the contrary that decrease to 4.5 mh/s...
Do you know if i proceed in the right way to overclock my GPU ? Has someone has succeed to overclock GPU on Ubutun and can help me ?