1. Your /gan dosn't work.
2. /i shows bios flash locked, but in bios shows the lock disabled.
3. I use biostar way. f12 before entering bios. It flash partial of the rom. I guess it's the safe way of afudos.
So what happened, could not fully flash in mod BIOS? If yes, I can help you do that via FPT and possibly grub/setup_var will be needed to make an edit if you need to disable BIOS lock.
No I didn't give up yet ! I just keep working silently. I ask somebody succeed in OC dump me a txt report. I can view it now, but not able to download it.
I will find a way out later and upload here. Hope it will be helpful.