Techgage published AMD Offers Users Boot Kits For Updating Their B450/X470 EFI For Ryzen 3000
A quote from the article:
When AMD launched its Ryzen 2000-series processors last spring, the company knew that some folks would end up having trouble installing its latest and greatest chips in previous generation motherboards. To help, the company would send you a temporary CPU to get the EFI update job done, and then you’d be able to install your latest CPU.AMD Offers Users Boot Kits For Updating Their B450/X470 EFI For Ryzen 3000
We haven’t thought much about this program since then, but a redditor with a keen eye noticed that the program has been pulled ahead to this launch, and overall, the rules seem to work the exact same.