MSI B550M-A PRO 
Specifications
Socket
AM4
Chipset
AMD® B550 Chipset
Memory Channel
DUAL
DIMM Slots
2
Max Memory (GB)
64GB
PCI-E x16
1
PCI-E Gen
Gen4 / Gen3
PCI-E x1
1
SATAIII
4
M.2 Slot
1
USB 3.2 ports (Front)
2(Gen 1, Type A)
USB 3.2 ports (Rear)
4(Gen 1, Type A)
USB 2.0 ports (Front)
4
USB 2.0 ports (Rear)
2 (Type A)
Serial ports(Front)
1
Audio ports (Rear)
Realtek® ALC892/ALC897 Codec
DVI-D
1
HDMI
1
CPU Support
Support for Windows® 10 64-bit
Note;
Supports AMD Ryzen™ 5000 & 3000 Series desktop processors (not compatible with AMD Ryzen™ 5 3400G & Ryzen™ 3 3200G) and AMD Ryzen™ 4000 G-Series desktop processors