BtR - How to mod and flash your AMD GPUs' bios for mining - YouTube
Polaris BIOS Editor guide how to use
GPU BIOS Guide (one click) - Ethereum Mining Guide for AMD and NVidia GPUs – Windows Cryptocurrency Mining Guide – Windows 10 Ethereum Mining Guide that contains information about GPU settings,BIOS modding,
Special BIOS-mod for RX5700 to increase more performance on gpus. : r/gpumining
How to MOD RX570 BIOS to get 29.8MH/s for Ethereum Mining on Windows 10 – Quantizd