Quote from: SeriousSnake on September 04, 2017, 11:30:17 AM

Hi everyone, newbie here, i really need some help

GPU: MSI RX570 Gaming X 4GB, Hynix vram

Using official AMD blockchain aug 23 drivers
MSI afterburner beta 15
BIOS Modded, copied 2:1500 strap to above, did not change 1:xxxx straps

I could get 24.9 mh/s for ETH after BIOS MOD
however I could not get to 28mh/s or above Huh

I tried overclocking in MSI AB, increased the memory clock from 1750mhz to 2000mhz, but the hashing rate actually dropped from 25mh/s to 24.8mh/s Huh

any help is greatly appreciated!!

With this kind of bios mod you won't be able to increase hashrate much. You need custom performance timing. You can search some of them.
I've post where to find performance timing for Samsung:
https://bitcointalk.org/index.php?topic=1954245.0