AMD Socket AM4, B550 Chipset, Phase-doubled 6-Phase VRM power delivery, 1x NVME Gen4x4 and 1x PCI-E Gen4x16 with 1x PCI-E Gen3 x16 (x4 only) and 1x PCI-E Gen3x1 slots.

MAXSUN B550M Specifications:

CHIPSET AMD® B550 Chipset
CPU (Max Support) AMD Socket AM4, support for: AMD Ryzen™ 5000 G-Series Processors/ AMD Ryzen™ 5000 Series Processors/ AMD Ryzen™ 4000 G-Series Processors/ AMD Ryzen™ 3000 Series Processors
MEMORY 2x DDR4, Maximum Memory Capacity 64GB
Memory Support DDR4 3800(O.C.) / 3733(O.C.) / 3666(O.C.) / 3600(O.C.) / 3200 / 3000 / 2933 / 2666 / 2400 / 2133 MHz
Supports AMD® A-XMP OC
Supports Dual-Controller Dual-Channel mode
ONBOARD GRAPHICS 1x VGA
*Support VGA, maximum resolution of 2048×1536 50Hz, 2048×1280 60Hz, 1920×1200 60Hz
1x HDMI™port
*HDMI™ port supports up to 4K@30Hz
*Graphics specifications may vary between CPU types.

EXPANSION SLOT

1x PCIe 4.0 x16 slot
1x PCIe 3.0 x4 slot
1x PCIe 3.0 x1 slot

STORAGE

M.2 slot (Key M), type 2242/2280 (supports PCIe 4.0 x4 mode)
4x SATA 6Gb/s ports
RAID Supports RAID 0, RAID 1, RAID 5 and RAID 10 for SATA storage devices
USB *Front USB (Total 6 ports)
2x USB 3.2 Gen1 Type A
4x USB 2.0
*Rear USB (Total 6 ports)
2x USB 3.2 Gen1 Type A
4x USB 2.0
LAN Realtek® RTL8111H 1G LAN
AUDIO Realtek® ALC897 Codec
5.1-Channel High Definition Audio
INTERNAL I/O 1x 24-pin Power Connector(ATX_PWR)
1x 8-pin Power Connector(CPU_PWR)
1x CPU Fan
2x System Fan
1x PS/2 interface
1x M.2 slots (Key-M)
4x SATA 6Gb/s ports
1x 4-Pin SPEAKER
1x Front Audio
1x COM_A Port
1x 9-Pin DEBUG_CON
1x CLR CMOS
LED FEATURE Without Debug LED
OPERATING SYSTEM Support for Windows® 11 64-bit, Windows® 10 64-bit
FORM FACTOR M-ATX
245mm x 200mm

Brand New Product with 10 months of warranty