Need bios mod help for Sapphire RX 480 nitro(not nitro+) 4GB

[ltcsprite]

Anyone have experience with these cards?

Would like to bios mod these cards and see if I can get some better performance, right now just running them stock bios with some overclocking.

Here's my default bios rom saved from Atiflash:

https://www.dropbox.com/s/a0rk2swbwulrumx/bios.rom?dl=0

Here's info from GPU-Z.  


Hynix memory.

I'm not sure which values I need to change in polaris BIOS editor.  

Can someone guide me thru modding the cards?  

[ltcsprite]

Per the usual not much help around here.

Decided to write my own shiz based off the rx 470

https://www.dropbox.com/s/966spwgku79xa28/470rxcopycathynixUK.rom?dl=0

feel free to test hopefully it helps someone.

6 GPU @ 166-167MH/s @ 930-950w or so stable

If anyone has a better rom feel free to share.