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 4.0/3.0 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 4.0/3.0 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 2.0/1.1 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