I think I'm doing something wrong.
My card is an rx 580 8GB, samsung memories.
I had :
-24.5 MH/s out of the box.
-27.1 @ 2220 @ 0.95
Now I have:
-29.2 @ 2230 @ 0.95 with 1750 into 2000 straps.
I think I should be able to squeeze something more but going higher with ram speeds will crash my system regardless of voltage.
You can't set voltage for memory. 2230 is pretty high, you have good memory. You need performance timings like Uber-mix.