AMD 5900 Series CPU Bios Upgrade Dilemma A320 B450 B550 X570 Chipset X5950 X5800 AM4 Raptoreum RTM

I finally got my second Raptoreum mining rig up. The problem was getting a new CPU to work in an previous generation supported motherboard. The Chipsets support the newer 5900 series processors with a bios update. What happens when you don't have an old processor to update the bios first? You really only have three options. 1. buy or barrow an old processor to upgrade the bios first. 2. Buy a motherboard with the latest and greatest chipset that has a bios that supports the 5900 series processor. 3. Buy a motherboard with flashback feature that allows you recover the bios without a CPU. I'm sure I'm not the only one having this problem.

Motherboards I tried

X570 Chipset (Success)
https://www.amazon.com/gp/product/B07T9PC9ZZ/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B07T9PC9ZZ&linkId=b3434ac129b81863622f44118b47ef55

B550 Chipset
https://www.amazon.com/gp/product/B089CT5GDM/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B089CT5GDM&linkId=059e963de9ceb0412da65375b9c3a719

B450 Chipset
https://www.amazon.com/gp/product/B089FWXH3S/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B089FWXH3S&linkId=dab9ee4604bea0d30b6e612f250ec294

A320 Chipset
https://www.amazon.com/gp/product/B06ZY2F35X/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B06ZY2F35X&linkId=f41d1b937e37eeedce495bc9dd0a806c