The MSI B450M Mortar is widely regarded as one of the absolute best Micro-ATX motherboards for the AMD AM4 platform. It gained legendary status in the hardware community due to its excellent 4+2 phase VRM cooling design, allowing it to handle high-end Ryzen processors that cheaper B450 boards struggled to run stably.
ComponentSpecification DetailsForm FactorMicro-ATX (244 mm x 244 mm)Socket / ChipsetAMD Socket AM4 / AMD B450Memory Support4x DDR4 DIMM Slots, Dual Channel (Up to 64GB/128GB depending on revision, up to 3466+ MHz OC)Storage Interfaces4x SATA III (6Gbps) + 2x M.2 Slots
• Slot 1: PCIe 3.0 x4 (Full NVMe speed)
• Slot 2: PCIe 2.0 x4Expansion Slots1x PCIe 3.0 x16 (Steel Armor reinforced), 1x PCIe 2.0 x16 (runs at x4), 2x PCIe 2.0 x1
Rear I/O Connectivity1x USB 3.1 Gen2 Type-C, 1x USB 3.1 Gen2 Type-A, 4x USB 3.1 Gen1, 2x USB 2.0
DisplayPort, HDMI (requires integrated graphics)
Gigabit LAN, 7.1 HD Audio + Optical S/PDIF
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