MB AM4 ASRock B550M-HDV mATX

// CPU
- AMD AM4 Socket
- Supports AMD AM4 Socket Ryzen™ 3000, 4000 G-Series and 5000 Series Desktop Processors
*Not compatible with AMD Ryzen™ 5 3400G and Ryzen™ 3 3200G.

Chipset
- AMD B550

Memory
- Dual Channel DDR4 Memory Technology
- 2 x DDR4 DIMM Slots
AMD Ryzen series CPUs (Matisse) support DDR4 4600+(OC) / 4533(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC, un-buffered memory*

Graphics
- Three graphics output options: D-Sub, DVI-D and HDMI
- Supports Triple Monitor
- Supports HDMI 2.1 with max. resolution up to 4K x 2K (4096x2160) @ 60Hz
- Supports DVI-D with max. resolution up to 1920x1200 @ 60Hz
- Supports D-Sub with max. resolution up to 1920x1200 @ 60Hz

Audio
- 7.1 CH HD Audio (Realtek ALC887 Audio Codec)

LAN
- PCIE x1 Gigabit LAN 10/100/1000 Mb/s
- Realtek RTL8111H

Slots
- 1 x PCI Express 4.0 x16 Slot (PCIE1: x16 mode)*
- 1 x PCI Express 3.0 x1 Slot

Storage
- 4 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0, RAID 1 and RAID 10), NCQ, AHCI and Hot Plug
- 1 x Hyper M.2 Socket, supports M Key type 2242/2260/2280 M.2 SATA3 6.0 Gb/s module and M.2 PCI Express module up to Gen4x4 (64 Gb/s) (with Matisse) or Gen3x4 (32 Gb/s) (with Renoir)*

USB
- 6 x USB 3.1 Gen1 Ports (2 Front, 4 Rear)
- 6 x USB 2.0 Ports

https://www.asrock.com/mb/AMD/B550M-HDV/index.asp#Overview