AMD XFX RX 570 8G Hynix bios

Hi everyone. My name is Nick and I am from Greece.
I am new to mining. I have setup an “educational” rig with 2 XFX RX570’s 8GB (Hynix) memory. Is there any guide and a good bios mod for me to flash iot achieve better hashrates?
Find attached my gpu’s details and settings (stock bios 1).
Thanks in advance for any help.