Gigabyte MBG-B550MK AMD AM4 M-ATX Motherboard 4x DDR4~128GB,1x PCIe x16, 1 x PCIe x1, 2x M.2, 4x SATA , 4x USB 3.2, 4x USB 2.0 FEATURES: AMD B550 motherboard adopts digital power supply design, PCI-E 4.0 x16 graphics card slot, PCI-E 4.03.0 M.2 slot, Gigabit high-speed network card equipped with intelligent management software, Smart Fan 5 Supports AMD Ryzen 5000 Series Ryzen 5000 G Series Ryzen 4000 G Series and Ryzen 3000 Series Processors Integrated 4 memory slots, support dual-channel ECC Non-ECC memory PCI-E 4.0x16 graphics card dedicated slot High-speed NVMe PCI-E 4.03.0 M.2 SSD slot High-quality audio dedicated capacitor + independent audio block isolation line Gigabit high-speed network card equipped with intelligent management software DP, HDMI interface supports multiple output functions Q-Flash Plus can easily update BIOS without installing CPU, memory, and graphics card Anti-sulfur resistance design prolongs service life SPECIFICATION: central processing unit (CPU) AMD AM4 socket, supports: AMD Ryzen 5000 G-series processors AMD Ryzen 5000-series processors AMD Ryzen 4000 G-series processors AMD Ryzen 3000-series processors (pleasetoCheck the GIGABYTE website for a list of supported processors) chipset AMD B550 Memory 4 DDR4 DIMM slots,HighestSupport up to 128 GB (Single slot supports 32 GB capacity) expansion ;1 PCI-E x16 slot,1 PCI-E x1 slot, storage device interface: 1 x M.2 socket (M2A_CPU) based on CPU 1 x M.2 socket (M2B_SB) based on chipset, 4 SATA 3.0 ports, based on chipset USB: Based on CPU: 4 USB 3.2 Gen 1 ports on the rear window IO Based on chipset: 2 USB 3.2 Gen 1 ports, which need to be connected to the USB port on the motherboard via a cable 6 USB 2.01.1 ports (4 on the rear window IO, 2 need to be connected to the USB port on the motherboard via a cable) operating system Support Windows 11 64-bit Support Windows 10 64-bit PCB specification Micro ATX specification; 2