Ryzen has 3 Microarchitectures, Zen, Zen +, and Zen 2. People have called it Ryzen 3rd Generation because "Zen 2" is the 3rd Microarchitecture. For all Ryzen 3XXX chips you need to select "Zen 2 gen" in the "Processor" drop down menu. Also, be sure to get the latest BIOS from your MB...