The AMD 'Matisse' Ryzen 3000 CPUs are still a couple of months away from launch but motherboards OEMs have started prepping for it by offering new AGESA updates that support the new processors. MSI, Asus, and BioStar have started rolling out AGESA v0.0.7.x that includes support for Zen 2 Ryzen 3000 CPUs. Other OEMs are expected to follow suit as we head closer to launch.
https://www.notebookcheck.net/AMD-Ryzen-3000-support-being-rolled-out-to-compatible-motherboards.414870.0.html