MSI PRO B840M-B AMD AM5 mATX Motherboard
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Specification
| Category | Details |
|---|---|
| Model | MSI PRO B840M-B |
| Supported CPU | AMD Ryzen™ 9000 / 8000 / 7000 Series |
| Socket | AM5 |
| Chipset | AMD B840 |
| BIOS | Flash BIOS Button |
| Form Factor | mATX (226 × 243.84 mm) |
| Memory Type | DDR5 |
| Memory Slots | 2× UDIMM |
| Maximum Memory | Up to 128GB |
| Supported Speed | 8000–5600 MT/s (OC), 5600–4800 MT/s (JEDEC) |
| PCIe Slots | 1× PCIe 4.0 x16, 1× PCIe 3.0 x1 |
| M.2 Slots | 2× PCIe 4.0 x4 |
| SATA Ports | 4× SATA 6Gb/s |
| Graphics Output | 1× HDMI 2.1 (4K@60Hz), 1× VGA |
| USB (Rear) | 2× USB 2.0, 4× USB 5Gbps Type-A |
| USB (Front) | 4× USB 2.0, 2× USB 5Gbps Type-A, 1× USB 5Gbps Type-C |
| LAN | Realtek 8125D 2.5G LAN |
| Wireless | Not Included |
| Audio | Realtek ALC897, 7.1-Channel HD Audio |
| RAID Support | RAID 0/1/10 (SATA), RAID 0/1 (NVMe) |
| Cooling Support | 1× CPU Fan, 2× System Fans |
| RGB Support | 3× ARGB, 1× RGB |
| Debug Features | 4× EZ Debug LED, EZ Memory Detection LED |
| TPM Support | TPM 2.0 Header |
| Operating System | Windows 11 64-bit Supported |
| Warranty | 3 Years Manufacturing Warranty |
Description
The MSI PRO B840M-B AM5 mATX Motherboard is a compact and efficient solution designed for users seeking reliable performance on the AMD AM5 platform. Powered by the AMD B840 chipset, it supports AMD Ryzen 9000, 8000, and 7000 Series desktop processors and delivers excellent memory performance with dual-channel DDR5 support up to 8000+ MT/s (OC) across two UDIMM slots, making it ideal for everyday computing, productivity, and entry-level gaming. The board features a PCIe 4.0 x16 slot for modern graphics cards, two PCIe 4.0 x4 M.2 slots for high-speed NVMe SSDs, and four SATA 6Gb/s ports with RAID support for flexible storage options. Display connectivity includes HDMI 2.1 with 4K@60Hz output and a VGA port for legacy monitors. Networking is handled by Realtek 8125D 2.5G LAN, ensuring fast and stable wired connectivity, while audio is powered by the Realtek ALC897 codec delivering immersive 7.1-channel HD sound. With practical features such as Flash BIOS Button, EZ Debug LEDs, EZ Memory Detection LED, multiple RGB headers, and essential cooling support, the MSI PRO B840M-B offers a balanced, future-ready platform for cost-effective AM5 system builds.
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