The B550 chipset has been absent for a while, meaning that mid-tier motherboard models were lacking and that space is about to be filled. So far, the only thing we got was a B550A chipset, which lacked proper support for PCIe 4.0 connection, based on the refreshed B450 chipset. The B550A supports only one PCIe 4.0 slot, the one connected directly to CPU, while the regular, non-A version is said to deliver proper PCIe 4.0 configuration. The first picture of AMD's upcoming B550 motherboard has appeared.