BIOSTAR RX 570 8G (memory samsung)

I bought this card, without bios flash it was 29.45 mh / s with bios flash it is now 31.47mh / s with the following OC 106 W fan70 core1155 dpm 0 vdd 880 mem 2070 ref 20.
Some way to increase hashrate on this board … thanks

can you please share the bios ?