Quick details:

• AMD B550
• Supports AMD Ryzen 5000 / 4000 G / 3000 Series* processors
• * Not compatible with AMD Ryzen 5 3400G & Ryzen 3 3200G.
• DDR4 5100+ / 5000 / 4866 / 4800 / 4733 / 4600 / 4533 / 4400 / 4266 / 4133 / 4000 / 3866 / 3733 / 3600 / 3466 / 3200 / 3066 / 3000 / 2933 / 2800 / 2667 (by A-XMP OC MODE)
• DDR4 3200 / 3066 / 3000 / 2933 / 2800 / 2667 / 2400 / 2133 / 1866 (by JEDEC)
• 1DPC 1R max speed 5100
• 1DPC 2R max speed 3866
• 2DPC 1R max speed 4000
• 2DPC 2R max speed 3600