B550 tomahawk how to choose boot gpu

I’ve just upgraded from a gigabyte b350 board and 1600 to the b550 tomahawk and 3700x. I run unraid and normally have two gpus installed one for hardware pass-through.

In the MSI bios I have not been able to find how to set my cheaper gpu as the default for boot (for use with unraid) and enable my better card to be set for hardware pass-through.

My gigabyte board had a simple setting to pick which pci slot.