ASUS PRIME MicroATX Motherboard with AMD B550 AM4 B550M-A chipset, compatible.

【Chipset/Socket/Standard】AMD B550 / AM4 Socket / MicroATX 【OS】Windows 10 64-bit [CPU] AMD Socket AM4 for 3rd Gen AMD Ryzen Processors [Supported Memory] 4 slots (maximum 128GB) 4400(O.C)/4266(O.C)/4133(O.C)/4000(O.C)/3866(O.C)/3600(O.C)/3466(O.C)/3200/3000/2800/2666/2400/2133 MHz, Unbuffered Memory 【Expansion Slot】1 x PCIe 4.0 x16 slot (supports x16 mode) 【Storage】4 x SATA 6Gb/s ports 【Interface】7x USB 3.2, 2x USB 2.0, etc. 【Dimensions】mATX Form Factor 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)