MB AM4 ASRock B450M-HDV R4.0 mATX

// CPU
- AMD AM4 Socket
- Supports CPU up to 105W

Chipset
- AMD B450

Memory
- Dual Channel DDR4 Memory Technology
- 2 x DDR4 DIMM Slots
- Support DDR4 3200+(OC)/2933(OC)/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 with max. resolution up to 4K x 2K (4096x2160) @ 24Hz / (3840x2160) @ 30Hz
- Supports DVI-D with max. resolution up to 1920x1200 @ 60Hz
- Supports D-Sub with max. resolution up to 2048x1536 @ 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 3.0 x16 Slot (PCIE2: x16 mode)*
- 1 x PCI Express 2.0 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 Ultra 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 Gen3 x4 (32 Gb/s)

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

https://www.asrock.com/MB/AMD/B450M-HDV%20R4.0/index.asp#Overview