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.