there is a 30MHlowenergy rom link in the last page.

All of my Sapphire 480 Refs rigs are with "28MHlowenergyOK" rom, but I have one or two rigs with 30MH one... not bad on ETH mining however ETH mining consumes too much power and too much heat -- it's like a death sentence for the card, stretching it beyond 30mh is not good because for ETH you need stable cards -- having the low power roms and slightly faster than 25/26MH like 28MH or 29Mh is good enough.

They do 30Mh as well.. (those nitro's)

Got 2 Elpida 4G's, one nitro and one non nitro, the nitro one does 30+ and the non nitro one does 29.5 stable.

But this is with custom timings.

Greetings

You should be able to get 28-32 mhs even on a rx 480 sapphire nitro.

Download your bios with atiflash, open it in polaris bios editor.

Copy the memory timing for the 1500 or 1750mhz to the 2000 mhz and higher blocks.

I believe you can copy 1500mhz memory timing code to 1750 and 2000 blocks.

Make sure you backup original bios first.

Haha, i honestly was thinking, no way, that's impossible.
So i checked the rom i uploaded, of course, it's the wrong one  

Will upload the right one as soon as i get at my office.