Vega 56 low ETHash

Hi, i accidently got a Vega 56 and have no idea what to do :wink:
I red some Threads and found a lot of ideas and OC Settings, but no one is working for me.
No my card is running - and stable, but onliy on ~28mh

I red i dont need any bios updates on the card and only settings !?
but ofter some time of testing i dont belive.

maybe theres any idea for my 5600xt, to get some more mh, too :wink:

thanks guys