Frustrating, I can get SMOS to mine ok with these but not quite full speed.
In windows I can get it to see all 13 580rx in safe mode, 10 in normal mode, but it crashes with "system thread exception not handled" when trying to boot with 13 in normal boot.
Did you mod the BIOS?
I am having a similar problem with my 1070s the overclock is having issues applying. But for AMD cards you need to mod the bios to get the full speed.