RX 570 Sapphire Pulse 8GB Mining

Guys I'm mining with 2 X Sapphire Pulse RX 570 GB (just started) and I am with default clocks. Getting around 24Mh/s each.

Can anyone help me with the clocks? I am afraid I will burn the cards if I start experimenting. Anyone has any experience?

I'm on HiveOS BTW