The B450 models come with Zen 2 built-in right from the start.
The B450 models come with Zen 2 built-in right from the start.
Based on my observations, most motherboards—even the A320—can handle Ryzen 3000 CPUs now. Manufacturers typically include BIOS updates that support the latest processors. Since July 2019, all produced boards have been compatible with Ryzen 3000. Unless you have an extremely outdated model, nearly every board today supports it.
A320 doesn't fully back Ryzen 3000. Unofficially it seems possible but most sources say otherwise. I wouldn't assume it will work without checking the specific model first. Also, it makes no sense to purchase an A320 expecting it to function well compared to a used B350 or B450.
Talk about the model lacking the Wi-Fi chipset? It won't connect to networks, so you'll need an alternative setup.
Not sure it would work. The Wi-Fi board came later. The DS3H isn't really top-notch. I'd prefer to compare it with the Pro4 from ASRock.