Specifications
CPU SocketAMD AM5
CPU SocketRyzen™ 9000 / 8000 / 7000 Series
DDR Type and SpeedDDR5 4800 to 8600 MT/s (OC)
NVMe Slots2X M.2, PCIe 4.0 -- 2X M.2, PCIe 5.0 -- 4 x SATA 6Gb/s
PCIe VersionPCIe 5.0 x16

The MSI PRO B840M-B is a highly efficient micro-ATX motherboard engineered to provide a rock-solid foundation for professional workloads and mainstream gaming. Built on the modern AMD AM5 socket with the AMD B840 chipset, it fully supports AMD Ryzen™ 7000, 8000, and 9000 series processors. Despite its budget-friendly profile, this motherboard layout features DDR5 high-speed memory support, dual Lightning Gen4 M.2 slots for rapid NVMe storage, and ultra-fast 2.5Gb Ethernet. Backed by a stable digital power design and MSI Core Boost, it delivers the everyday reliability and system speed needed for next-gen setups.