Don't expect much more from it.
I have several 570's ranging from 26,5 to 28,5Mhs.
I haven't seen more then 28.5 in any 570 to date, so yours is totaly normal performance wise.
really? even my old 470 refs are doing better then the numbers you state.
rx570 can go up to 31. Normally however it hashes around 29.5-30.5
I've got a rig of rx570 4gb MSI gaming with Elpida doing mere 29.4. And the only slower 570 I've got is ASUS Expedition hashing at 28.8
Of course it's possible if you are willing to deal with memory errors in HWinfo.
GPUs can have hundreds of errors and seem to work fine but you have a steady higher stale shares percentage and the ocasional rejected share so i cannot accept 30mh as a 570s normal number.
https://s33.postimg.cc/hgv9pnzxb/dh31.jpgThank you very much for your post friend!
I seriously have no idea why i get such awful performance from my 570s... Most of them use combined memory chips from Elpida and Micron... I used one click timing patch and i cannot get more then 28,5 stable no way.
I have 7 of them from Asus and Gigabyte, all same shit, even have one that maxes at 1880MHZ mem.
What straps are you using? Maybe that's the deal.
also fyi mem errors in HwInfo are both those that were corrected and those that were not.