To do this, it sends you an Athlon 200GE to update the BIOS.
If your motherboard is not compatible with Ryzen 3000, AMD gives you a cable
The third generation of Ryzen processors is already ringing at ease, and even users with tighter budgets can get on the Zen 2 family car by becoming an AM4 400 series board, either an X470 or a B450. Now, what if your new board does not come standard with the updated BIOS? Technically that board should be compatible with Ryzen 3000, so AMD has prepared a "starter kit" that lends to users in that situation. It consists of an Athlon 200GE processor that we can install on our board to update the BIOS.
Before contacting the company, we recommend making sure if the manufacturer of our board or the store where we buy it can exchange our model for another compatible one, or update the BIOS for us. On the other hand, it also asks us to check if our board allows BIOS installation without having a processor installed. In the event that none of this is possible, AMD encourages us to request an RMA (merchandise return authorization) to receive one of its kits - which we will then have to return within 10 days. You can read all the details here.