From WikiChip
Template:amd socket am4 chipsets

Socket AM4 Platform [Edit]
Segment Chipset USB SATA SATAe PCIe RAID Dual PCIe Overclocking
3.1 G1 3.1 G2 2.0
400-series (Zen+)
Mainstream B450 2 2 6 4 + 2x NVMe 1 6x Gen2 0,1,10
Enthusiast X470 6 2 6 6 + 2x NVMe 2 8x Gen2 0,1,10
300-series (Zen)
Small Form Factor A300, B300 4 0 0 2 + 2x NVMe 1 4x Gen3 0,1
X300 4 0 0 2 + 2x NVMe 1 4x Gen3 0,1
Entry-level A320 6 1 6 4 + 2x NVMe 2 4x Gen2 0,1,10
Mainstream B350 6 2 6 4 + 2x NVMe 2 6x Gen2 0,1,10
Enthusiast X370 6 2 6 6 + 2x NVMe 2 8x Gen2 0,1,10