AMD RyzenTM 5000 Series, RyzenTM 5000 G-Series, RyzenTM 4000 G-Series, and RyzenTM 3000 and 3000 G-Series Processors are supported by the GIGABYTE B550M DS3H DDR4 Motherboard. Four DIMMs, five plus three phases, dual channel ECC/non-ECC unbuffered DDR4, and a pure digital VRM solution with low RDS(on) MOSFETs NVMe PCIe 4.0/3.0 M.2 Connectors with Dual Ultra-Fast Slots and Ultra Durability ™ PCIe 4.0 Ready CPU AMD RyzenTM 5000 Series, Ryzen™ 5000 G-Series, Ryzen™ 4000 G-Series, and AMD Ryzen™ 3000 and Ryzen™ 3000 G-Series Processors are supported by AMD Socket AM4. Chipset AMD B550 Memory Architecture for Dual Channel Memory Recollection Bus speed support for DDR4 memory modules operating at 4733, 4600, 4400, 4266, 4133, 4000, 3866, 3733, 3600, 3466, 3400, 3200, 2933, 2667, 2400, and 2133 MHz Maximum Memory Socket: 128 GB AMD RyzenTM is supported by AMD Socket AM4.