I have a Sapphire RX580 OC 8GB limited edition (blue case) and am wanting to use it for mining.
Under windows, this is no issue. I can set the clock speed to 1315MHz and the mem speed to 2250MHz and it shows me 31.9MH/s @ 101W (according to tool, not wall)
Under Linux it is a different story. I downloaded the latest driver, 17.x, but cannot push it past 21.6MH/s.
Looking at the powerplay output, I can only choose 1300 or 1340MHz, but the mem frequencies stop at 2000MHz.
There is no 2250MHz and if i choose level 3 for mem, it tells me that there is no level 3.
It is kind of a shame that you are stuck with levels, instead of just punching in the frequncy like under windows.
Under windows i needed to include a patch from a mining site. Does this apply to Linux as well? I just have not been able to find one yet.
Would be great if someone has an idea on where I am doing something wrong.