Motherboard Specifications Supported Processors AMD Socket AM4 support for: AMD Ryzen™ 5000 Series/ Ryzen™ 5000 G-Series/ Ryzen™ 4000 G-Series and Ryzen™ 3000 and Ryzen™ 3000 G-Series Processors Chipset AMD B550 Socket AMD AM4 Memory Type DDR4 Memory Slots 4 Maximum Memory 128GB Memory Bus Speed 4 x DDR4 DIMM sockets supporting up to 128 GB (32 GB single DIMM capacity) of system memory Support for DDR4 4733(O.C.) / 4600(O.C.) / 4400(O.C.) / 4266(O.C.) / 4133(O.C.) / 4000(O.C.) / 3866(O.C.) / 3733(O.C.) / 3600(O.C.) / 3466(O.C) / 3400(O.C.) / 3200 / 2933 / 2667 / 2400 / 2133 MHz memory modules Dual channel memory architecture Support for ECC Un-buffered DIMM 1Rx8/2Rx8 memory modules* * ECC memory (ECC mode) support varies by CPU Support for non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules Support for Extreme Memory Profile (XMP) memory modules Multi-GPU Support none Ports 1 x PS/2 keyboard/mouse port 1 x DisplayPort 1 x HDMI port 4 x USB 3.2 Gen 1 ports 4 x USB 2.0/1.1 ports 1 x RJ-45 port 3 x audio jacks Form Factor mATX M.2 Slots Yes Expansion Slots 1 x PCI Express x16 slot integrated in the CPU: AMD Ryzen™ 5000 Series*/3000 Series Processors support PCIe 4.0 x16 mode * Actual support may vary by AMD CPU's specification. AMD Ryzen™ 5000 G-Series/4000 G-Series/3000 G-Series Processors support PCIe 3.0 x16 mode 1 x PCI Express x1 slot integrated in the Chipset: Supporting PCIe 3.0 x1 mode