Asrock B550 Pro4, AM4, 90-MXBCZ0-A0UAYZ

shape factor ATX
chipset AMD B550
VRM 8 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), 2x PCIe 3.0 x1, 1x M.2/M-Key (PCIe 4.0 x4, 22110/2280/2260), 1x M.2/M-Key (PCIe 3.0 x2/SATA, 2280/2260/2242), 1x M.2/E-Key (PCIe, 2230)
external connectors 1x VGA, 1x HDMI 2.1, 1x USB-C 3.1 (B550), 1x USB-A 3.1 (B550), 4x USB-A 3.0, 1x Gb LAN (Realtek RTL8111H), 3x jack, 1x PS/2 Combo
Internal connectors 1x USB 3.0 Header (2x USB 3.0), 2x USB 2.0 header (4x USB 2.0), 6x SATA 6Gb/s (B550), 1x serial, 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 not available
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, 1 zone (page right)
BIOS 1x 32MB (256Mb)
Special features audio+solid capacitors, Diagnostic LED (LED indicators), 1x M.2-passive cooler
Warranty three years