i'm not sure, but I have the rx580 8gb xfx gts-xxx edition, Hynix mem.

I'm not no expert, but I've bios moded and running a lot of these cards atm.

I can give you timing straps to mod it, people might give me shit about timing strap mod here. but hey, I'm getting 26.5 on Smos with the current dag and no issues so far for 3 months running solid. if you run windows with the new driver fix, you should be getting close to 30
if you want I can pm you the straps. core and mem settings I can also give you mine, but you will need to tweak that yourself for errors.

recommended to do bios mod in windows. than run on ethos.

pm me if you want my bios mod.