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
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

any help is greatly appreciated!!