According to a posting from German retailer Alternate, pre-built desktops that employ AMD B550 motherboards could debut as soon as next month. However, a DigiTimes report claimed that motherboard manufacturers will receive their B550 orders in the fourth quarter, which suggests a later release date for AMD B550-based motherboards.
An die Motherboard-Hersteller sollte der Chipsatz geliefert worden sein, wann sie die Motherboard ausliefern ist noch unklar - vermutlich im ersten Quartal 2020.
Biostar Exec Says AMD B550 and Intel 400-Series Motherboards Are Ready For Release | wccftech
AMD B550 Chipset Specs Detailed | Tom's Hardware