Asrock B550M Steel Legend, AM4, 90-MXBCU0-A0UAYZ

shape factor µATX
chipset AMD B550
CPU-Compatibility Ryzen 4000G, Ryzen 3000, TDP-Limit: 105W
VRM 10 virtual phases
RAM 4x DDR4 DIMM, dual PC4-37866U/DDR4-4733 (OC), max. 128GB (UDIMM)
Extension slots 1x PCIe 4.0 x16, 1x PCIe 3.0 x16 (x4), 1x PCIe 3.0 x1, 1x M.2/M-Key (PCIe 4.0 x4, 2280), 1x M.2/M-Key (PCIe 3.0 x2/SATA, 2280), 1x M.2/E-Key (PCIe, 2230)
external connectors 1x HDMI 2.1, 1x DisplayPort 1.4, 1x USB-C 3.1 (B550), 1x USB-A 3.1 (B550), 4x USB-A 3.0, 2x USB-A 2.0, 1x 2.5GBase-T (Realtek RTL8125B-CG), 5x jack, 1x toslink, 1x PS/2 Combo
Internal connectors 2x USB 3.0 Header (4x USB 3.0), 2x USB 2.0 header (4x USB 2.0), 6x SATA 6Gb/s (B550), 1x TPM-Header, 1x Speaker-Header
Header Cooling 1x CPU fan 4-Pin, 1x CPU fan/pump 4-Pin, 4x fan/pump 4-Pin
Header Lighting 2x 4-Pin RGB (+12V/G/R/B, max. 3A), 2x 3-Pin ARGB (+5V/DATA/GND, max. 3A)
buttons/Switches clear-CMOS-Button (external)
Audio 7.1 (Realtek ALC1200)
Graphics CPU
Wireless not available
RAID level 0/1/10 (B550)
Multi-GPU AMD 2-Way-CrossFireX (x16/x4)
Power connections 1x 24-Pin ATX, 1x 8-Pin EPS12V, 1x 4-Pin ATX12V
Lighting RGB, 2 zones (chipset cooler, I/O cover)
BIOS 1x 32MB (256Mb)
Special features audio+solid capacitors, Diagnostic LED (segment indication), I/O-shield integrated, 2x M.2-passive cooler
Warranty three years