Nem reménytelen a helyzet de nem általános.
Szóval itt van, az AMD leírása mit lehet tenni ha még olyan BIOS van ami nem támogatja a CPU-t. 4 féle megoldást sorol fel, pl. bootkit rendelése.
https://www.amd.com/en/support/kb/faq/pa-100
De van még egy érdekes lehetőség USB BIOS Flashback
USB BIOS Flashback
Select motherboards are designed to support “USB BIOS Flashback,” which allows for BIOS updates from a flash drive—even if the current BIOS on the motherboard does not have the software code to boot a new processor. Some motherboards can even update the BIOS when there’s no CPU in the socket at all. Such motherboards feature special hardware to enable USB BIOS Flashback, and every manufacturer has a unique procedure to execute USB BIOS Flashback. Customers are encouraged to determine if their motherboard supports USB BIOS Flashback and, if yes, follow the update steps described in the motherboard’s support documentation.
Két példa.
https://www.msi.com/Landing/amd-ryzen-b450-gaming-motherboard#bios_Flash%20BIOS
https://rog.asus.com/technology/republic-of-gamers-motherboard-innovations/usb-bios-flashback/