Re: Ethash DAG epoch RX470/480/570/580 FIX !!

There's definitely something wrong with your setup. You should be getting about 24 at stock. EDIT: or maybe 22 since they are 4gb

I really do not think so, I have 6 Asus Rog Rx 470 4G hynix, 1 Gygabyte Rx 470 4Gb gaming 1 hynix, and 2 XFX Rx 470 4Gb samsung dual BIOS.
Except for the XFX (Which seemed to be already overclocked), all of them hits 20 at stock, I tried claymore 9.5, 9.7 and windows and linux.
Overclocked all cards gets 24,5 in windows (linux stays 20)

This is what a 470 can do.

http://imgur.com/a/8ajS4

You can say there's nothing wrong when you achieve this.

Can you share your mod? My HIS rx470 (Hynix) can only reach 21 MH/s (stock), 22.x (modded) & 23.x (DAG fix). Thank you.

Mine are Sapphire with Samsung. They key is custom memory straps. There's a thread here about it: https://bitcointalk.org/index.php?topic=1758267.0
Once you give that a read you should be able to do it yourself.

Also I found that -asm 2 helps a lot with the 470's