AMD B550 Supports AMD Ryzen 5000 Series processors Supports 3rd Generation AMD Ryzen processors Supports 3rd Generation AMD Ryzen with Radeon Graphics processors DDR4 4733(OC) / 4600(OC) / 4400(OC) / 4000(OC) / 3600(OC) / 3333(OC) / 3200 / 2933 / 2667 / 2400 / 2133 (3rd Gen AMD Ryzen with Radeon Graphics processors) DDR4 4400(OC) / 4000(OC) / 3866(OC) / 3800(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3400(OC) / 3333(OC) / 3300(OC) / 3200 / 2933 / 2667 / 2400 / 2133 (AMD Ryzen 5000 series processors / 3rd Gen AMD Ryzen processors)