Asrock B550 Phantom Gaming ITX/ax, AM4, 90-MXBD40-A0UAYZ

Shape factor mini-ITX
chipset AMD B550
CPU-Compatibility Ryzen 4000G, Ryzen 3000, without TDP limitation (Manufacturer-list)
VRM 8 real phases (6+2), PWM-Controller: RAA 229004 (max. 8 phases)
MOSFETs CPU 6x 90A ISL99390A
MOSFETs SoC 2x 60A ISL99227A
RAM 2x DDR4 DIMM, dual PC4-43200U/DDR4-5400 (OC), max. 64GB (UDIMM)
Extension slots 1x PCIe 4.0 x16, 1x M.2/M-Key (PCIe 4.0 x4, 2280), 1x M.2/M-Key (PCIe 3.0 x4/SATA, 2280, back side), 1x M.2/E-Key (PCIe, 2230, occupied with WiFi+BT module)
external connectors 1x HDMI 2.1 (iGPU), 1x DisplayPort 1.4 (iGPU), 1x USB-C 3.1 (B550), 1x USB-A 3.1 (B550), 4x USB-A 3.0, 1x 2.5GBase-T (Intel I225-V), 3x jack
Internal connectors 1x USB-C 3.1 Key-A Header (B550), 1x USB 3.0 Header (2x USB 3.0), 1x USB 2.0 header (2x USB 2.0), 4x SATA 6Gb/s (B550), 1x TPM-Header
Header Cooling 1x CPU fan 4-Pin, 1x CPU fan/pump 4-Pin, 1x fan/pump 4-Pin
Header Lighting 1x 4-Pin RGB (+12V/G/R/B, max. 3A), 1x 3-Pin ARGB (+5V/DATA/GND, max. 3A)
buttons/Switches not available
Audio 7.1 (Realtek ALC1220)
onboard-Graphics iGPU
Wireless WLAN 802.11a/b/g/n/ac/ax (2x2, Intel AX200), Bluetooth 5.1
RAID level 0/1/10 (B550)
Multi-GPU not available
Power connections 1x 24-Pin ATX, 1x 8-Pin EPS12V
Lighting RGB, 1 zone (page bottom)
BIOS 1x 32MB (256Mb)
Special features audio+solid capacitors, I/O-shield integrated, 1x M.2-passive cooler
Warranty three years