Asrock B450 Steel Legend, AM4, 90-MXBA00-A0UAYZ

Form factor ATX
Chipset AMD B450
CPU-Compatibility Ryzen 3000, Ryzen 3000G, Ryzen 2000, Ryzen 2000G, Ryzen 1000, Athlon 3000G, Athlon 200G, TDP-Limit: 105W (Manufacturer)
VRM 6 real phases (4+2), PWM-Controller: uP9505 (max. 6 phases)
MOSFETs CPU 4x 55A SM4337/8x SM4336
MOSFETs SoC 4x 55A SM4337/SM4336
RAM 4x DDR4 DIMM, dual PC4-28266U/DDR4-3533 (OC), max. 64GB (UDIMM)
Extension slots 2x PCIe 3.0 x16 (1x x16, 1x x4), 4x PCIe 2.0 x1, 1x M.2/M-Key (PCIe 3.0 x4, 2280/2260/2242/2230), 1x M.2/M-Key (PCIe 3.0 x2/SATA, 22110/2280/2260/2242/2230)
External connectors 1x HDMI 1.4, 1x DisplayPort 1.2, 1x USB-C 3.1 (B450), 1x USB-A 3.1 (B450), 4x USB-A 3.0, 2x USB-A 2.0, 1x Gb LAN (Realtek RTL8111H), 5x jack, 1x toslink, 1x PS/2 Combo
Internal connectors 1x USB 3.0 Header (2x USB 3.0), 2x USB 2.0 header (4x USB 2.0), 4x SATA 6Gb/s (B450), 2x SATA 6Gb/s (ASM1061), 1x serial, 1x TPM-Header
Header Cooling 1x CPU fan 4-Pin, 1x CPU fan/pump 4-Pin, 3x fan/pump 4-Pin
Header Lighting 2x RGB-Header 4-Pin (5050), 1x RGB-Header 3-Pin (WS2812B)
Buttons/Switches not available
Audio 7.1 (Realtek ALC892)
RAID level 0/1/10 (B450)
Multi-GPU AMD 2-Way-CrossFireX (x16/x4)
Power connections 1x 24-Pin ATX, 1x 8-Pin EPS12V
Graphics CPU
Lighting RGB, 2 zones (chipset cooler, I/O cover)
Special features audio+solid capacitors, ECC-support
Warranty three years (handling by merchant)
Note motherboard certified for HDMI 1.4. HDMI 2.0 possible with Ryzen 2000 and higher.