https://wccftech.com/amd-b550-a520-chipset-mass-production-q1-2020-asmedia/

In a report by ChinaTimes, it is reported that AMD's upcoming B550 and A520 chipset production for the 3rd Gen Ryzen platform is expected in Q1 2020. The B550 and A520 chipsets would power budget and entry-tier motherboards and would be outsourced to ASMedia rather than developed by AMD themselves as in the case of the X570 chipset.

The two chipsets that would be produced include the budget tier B550 and the entry-tier A520. The AMD Ryzen platform currently features the X570 chipset based AM4 motherboards which come in at a much higher price due to their high-end / enthusiast positioning. We have seen a significant price hike for X570 tier motherboards compared to X470 and X370 and while motherboard makers are targetting the sub $200 US market aggressively with their new X570 designs, there's still a large market under the $150 US that needs to be covered.