ASUS Prime B550M-A/CSM, AMD B550, AM4, 90MB14I0-M0EAYC

Form factor µATX
Plinth AMD AM4
Chipset AMD B550
CPU Compatibility Ryzen 5000G, Ryzen 5000, Ryzen 4000G, Ryzen 3000, Ryzen 5000)
RAM 4x DDR4 DIMM, dual PC4-38400U/DDR4-4800 (OC), max. 128GB (UDIMM)
Expansion Slots 1x PCIe 4.0 x16, 2x PCIe 3.0 x1, 1x M.2/M-Key (PCIe 4.0 x4/SATA, 22110/2280/2260/2242), 1x M.2/M-Key (PCIe 3.0 x4/SATA, 2280/2260/2242)
External connections 1x VGA (iGPU), 1x DVI-D (iGPU), 1x HDMI 2.1 (iGPU), 2x USB-A 3.1 (10Gb/s, B550), 4x USB-A 3.0 (5Gb/s), 1x Gb LAN (Realtek RTL8111H), 3x Jack, 1x PS/2 Combo
Internal connections 1x USB 3.0 header (5Gb/s, 2x USB 3.0), 2x USB 2.0 header (480Mb/s, 4x USB 2.0), 4x SATA 6Gb/s (B550), 1x serial, 1x TPM header, 1x S/PDIF header, 1x speaker header, 1x COM debug header
Header Cooling 2x CPU fan 4-pin, 2x fan 4-pin
Header Lighting 2x 4-pin RGB (+12V/G/R/B, max. 3A), 1x 3-pin ARGB (+5V/DATA/GND, max. 3A, ASUS Gen2)
Buttons/Switches N/A
Audio 7.1 (Realtek ALC887)
Graphic iGPU
Wireless N/A
RAID Level 0/1/10 (B550)
Multi-GPU N/A
Power connections 1x 24-pin ATX, 1x 8-pin EPS12V
VRM 8 virtual phases (4+4), 6 real phases (4+2), PWM controller: ASP1106 (RT3667BE, max. 6 phases)
MOSFETs CPU (VCORE) 4x 58A SiRA14DP/8x SiRA12DP
MOSFETs SoC (VCCGT) 4x 58A SiRA14DP/SiRA12DP
Lighting orange, 1 zone (audio signal path)
BIOS 1x 32MB (256Mb)
Particularities Audio+solid capacitors, ECC support, onboard TPM 2.0 support (AMD fTPM, see additional manufacturer's link), White Build compatible (PCB primary black)