Chipset
AMD B550

Memory
2 x DDR4 DIMM sockets supporting up to 64 GB (32 GB single DIMM capacity) of system memory
3rd Gen AMD Ryzen™ Processors:
Support for DDR4 5100(O.C.) / 5000(O.C.) / 4866(O.C.) / 4600(O.C.) / 4400(O.C.) / 4000(O.C.) / 3600(O.C.) / 3333(O.C.) /3200/2933/2667/2400/2133 MHz memory modules
3rd Gen AMD Ryzen™ with Radeon™ Graphics processors:
Support for DDR4 5100(O.C.) / 5000(O.C.) / 4866(O.C.) / 4600(O.C.) / 4400(O.C.) / 4000(O.C.) / 3600(O.C.) / 3333(O.C.) /3200/2933/2667/2400/2133 MHz memory modules
Dual channel memory architecture
Support for ECC Un-buffered DIMM 1Rx8/2Rx8 memory modules
Support for non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules
Support for Extreme Memory Profile (XMP) memory modules

Intel® HD Graphics support:
1 x D-Sub port
1 x DVI-D port
1 x HDMI port
Support for up to 3 displays at the same time
Maximum shared memory of 16 GB

Audio
Realtek® ALC887 codec
High Definition Audio
2/4/5.1/7.1-channel

LAN
Realtek® GbE LAN chip (1000 Mbit/100 Mbit)

Expansion Slots
1? x PCI Express x16 slot, integrated in the CPU:
3rd Gen AMD Ryzen™ support PCIe 4.0 x16 mode
3rd Gen AMD Ryzen™ with Radeon™ Graphics support PCIe 3.0 x16 mode
2 x PCI Express x1 slots (PCIEX1_1, PCIEX1_2), integrated in the Chipset:
Supporting PCIe 3.0 x1 mode

Storage Interface
1? x M.2 connector
3rd Gen AMD Ryzen™ support SATA and PCIe 4.0 x4/x2 SSDs
3rd Gen AMD Ryzen™ with Radeon™ Graphics support SATA and PCIe 3.0 x4/x2 SSDs
4 x SATA 6Gb/s connectors:
Support for RAID 0, RAID 1, and RAID 10

USB
Integrated in the CPU:
4 x USB 3.2 Gen 1 ports
Chipset:
2 x USB 3.2 Gen 1 ports
4 x USB 2.0/1.1 ports

1 x addressable LED strip header
1 x RGB LED strip header
1 x Trusted Platform Module (TPM) header
1 x serial port header

Operating System
Support for Windows 10 64-bit

Form Factor
Micro ATX Form Factor; 24.4cm x 20.5cm

More Info:
https://www.gigabyte.com/Motherboard/B550M-S2H-rev-10#kf