The MSI PRO B550-S is a reliable ATX motherboard built around the AMD B550 chipset, designed for professionals and enthusiasts seeking a stable and capable foundation for their desktop build. Finished in black, it supports AMD Ryzen 3000, 4000, and 5000 Series processors, making it a versatile choice for a wide range of AMD-based configurations. The board measures 304.8 x 243.8 mm and fits standard ATX cases with ease.
Memory and Storage
The MSI PRO B550-S features four DDR4 memory slots with support for up to 128 GB of RAM, running at speeds up to 3200 MHz natively and up to 4866 MHz via overclocking. For storage, the board offers two M.2 slots alongside four SATA III connectors, providing ample options for fast NVMe drives and traditional storage devices. A PCI Express x16 Gen 4 slot and a PCI Express 3.0 x1 slot offer further expansion flexibility.
Connectivity and I/O
Networking is handled by a Realtek RTL8111H Gigabit LAN controller, delivering stable wired connectivity via a single RJ-45 port. The board includes a comprehensive USB lineup, featuring one USB 3.2 Gen 2 Type-A port, one USB 3.2 Gen 2 Type-C port, and one USB 3.2 Gen 1 Type-C port. Video output is provided through a single HDMI port, while audio is managed by a Realtek ALC897 chip. Note that Bluetooth is not included on this board.
Product number manufacturer:
PRO B550-S
Audio
Connectivity
USB 3.2 (Gen 1) type C ports:
1
USB 3.2 (Gen 2) type A ports:
1
USB 3.2 (Gen 2) type C ports:
1
Expansion slots
PCI Express 3.0 x1 slots:
1
Internal I/O
Memory
Supported memory clock speeds:
3200 MHz
Supported memory clock speeds (OC):
4866 (OC) MHz
Networking
Network technology (wired):
Physical characteristics
Processor
Compatible processor series:
AMD Ryzen 3000 Series, AMD Ryzen 4000 Series, AMD Ryzen 5000 Series
Technical details
Warranty
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