to roll back the bios, I would need to put the old cpu back, as the one that I'm using now is the minimum that supports the 4600G.
I've tried two versions that supports this CPU, the oldest and newest, no change.
I've tried the R5 4600G on my old x370 board, but, I'm unable to boot any Linux os on it, it resets itself with the DRAM led error, as it is a really old board it is probably something else.
Not sure why it works with the arch usb install image, maybe a newer kernel?